Unit 1: Uniform Motion Name: Kate, Colleen, Ava, and Avery
Worksheet 8 Date: 2/22/17 Period: S2
Speed and Velocity Problems
1. What is the average speed of a cheetah that sprints 100 m in 4 s? How about if it sprints
50 m in 2 s?
25 m per s
2. If a car moves with an average speed of 60 km/hr for an hour, it will travel a distance of
60 km. How far will it travel if it continues this average rate for 4 hrs?
- After 4 hours, the car will travel 240 km
3. A runner makes one lap around a 200 m track in a time of 25.0 s. What was the runner's
average speed? Answer: 8.0 m/s
200 m /25 s =
4. Light and radio waves travel through a vacuum in a straight line at a speed of very nearly
3.00 × 108 m/s. How far is light year (the distance light travels in a year)? Answer: 9.50
× 1015 m.
5. A motorist travels 406 km during a 7.0 hr period. What was the average speed in km/hr
and m/s? Answers: 58 km/hr, 16 m/s.
6. A bullet is shot from a rifle with a speed of 720 m/s. What time is required for the bullet
to strike a target 3240 m away?
- 4.5 s.
7. Light from the sun reaches the earth in 8.3 minutes. The speed of light is 3.0 × 108 m/s.
In kilometers, how far is the earth from the sun? Answer: 1.5 × 108 km.
8. *An auto travels at a rate of 25 km/hr for 4 minutes, then at 50 km/hr for 8 minutes, and
finally at 20 km/hr for 2 minutes. Find the total distance covered in km and the average
speed for the complete trip in m/s. Answers: 9 km, 10.7 m/s.
9. *If you traveled one mile at a speed of 100 miles per hour and another mile at a speed of
1 mile per hour, your average speed would not be (100 mph + 1 mph)/2 or 50.5 mph.
What would be your average speed? (Hint: What is the total distance and total time?)
Answer: 1.98 mph.
10. *What is your average speed in each of these cases?
a. You run 100 m at a speed of 5.0 m/s and then you walk 100 m at a speed of 1.0
m/s.
b. You run for 100 s at a speed of 5.0 m/s and then you walk for 100 s at a speed of
1.0 m/s. Answers: 1.7 m/s, 3.0 m/s.
11. *A race car driver must average 200 km/hr for four laps to qualify for a race. Because of
engine trouble, the car averages only 170 km/hr over the first two laps. What average
speed must be maintained for the last two laps?
200 km/hr/170 km/hr =1.2 km/hr
12. *A car traveling 90 km/hr is 100 m behind a truck traveling 50 km/hr. How long will it
take the car to reach the truck?
T=D/R T=100 m/ 90 km/hr = 1.1 HR
13. The peregrine falcon is the world's fastest known bird and has been clocked diving
downward toward its prey at constant vertical velocity of 97.2 m/s. If the falcon dives
straight down from a height of 100. m, how much time does this give a rabbit below to
consider his next move as the falcon begins his descent?
- About 1.02 seconds
More Speed and Velocity Problems
14. Hans stands at the rim of the Grand Canyon and yodels down to the bottom. He hears his
yodel back from the canyon floor 5.20 s later. Assume that the speed of sound in air is
340.0 m/s. How deep is the canyon?
- 1768 feet
15. The horse racing record for a 1.50 mi. track is shared by two horses: Fiddle Isle, who ran
the race in 143 s on March 21, 1970, and John Henry, who ran the same distance in an
equal time on March 16, 1980. What were the horses' average speeds in:
a. mi/s?
- 1.01 mi/second
b. mi/hr?
- 37 mi/hr
16. For a long time it was the dream of many runners to break the "4-minute mile." Now
quite a few runners have achieved what once seemed an impossible goal. On July 2,
1988, Steve Cram of Great Britain ran a mile in 3.81 min. During this amazing run, what
was Steve Cram's average speed in:
a. mi/min? 1 / 3.81 min
b. mi/hr? 16 miles per hour
17. It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be late for French
class for the third time this week. She must get from one side of the school to the other
by hurrying down three different hallways. She runs down the first hallway, a distance of
35.0 m, at a speed of 3.50 m/s. The second hallway is filled with students, and she covers
its 48.0 m length at an average speed of 1.20 m/s. The final hallway is empty, and
Suzette sprints its 60.0 m length at a speed of 5.00 m/s.
a. Does Suzette make it to class on time or does she get detention for being late
again?
- No, she will be late again
b. Draw a distance vs. time graph of the situation. (Assume constant speeds for each
hallway.)
18. During an Apollo moon landing, reflecting panels were placed on the moon. This
allowed earth-based astronomers to shoot laser beams at the moon's surface to determine
its distance. The reflected laser beam was observed 2.52 s after the laser pulse was sent.
The speed of light is 3.0 × 108 m/s. What was the distance between the astronomers and
the moon?
19. For many years, the posted highway speed limit was 88.5 km/hr (55 mi/hr) but in recent
years some rural stretches of highway have increased their speed limit to 104.6 km/hr (65
mi/hr). In Maine, the distance from Portland to Bangor is 215 km. How much time can
be saved in making this trip at the new speed limit?
20. The tortoise and the hare are in a road race to defend the honor of their breed. The
tortoise crawls the entire 1000. m distance at a speed of 0.2000 m/s while the rabbit runs
the first 200.0 m at 2.000 m/s The rabbit then stops to take a nap for 1.300 hr and
awakens to finish the last 800.0 m with an average speed of 3.000 m/s. Who wins the
race and by how much time?
-
21. Two physics professors challenge each other to a 100. m race across the football field.
The loser will grade the winner's physics labs for one month. Dr. Rice runs the race in
10.40 s. Dr. De La Paz runs the first 25.0 m with an average speed of 10.0 m/s, the next
50.0 m with an average speed of 9.50 m/s, and the last 25.0 m with an average speed of
11.1 m/s. Who gets stuck grading physics labs for the next month?
Acceleration Worksheet. Name:
Date: ______________
_________________________
14.2 Acceleration
Acceleration is the rate of change in the speed of an object. To determine the rate of acceleration,
you use the formula below. The units for acceleration are meters per second per second or m/s2.
A positive value for acceleration shows speeding up, and negative value for acceleration shows
slowing down. Slowing down is also called d eceleration.
The acceleration formula can be rearranged to solve for other variables such as final speed (v 2)
and time (t) .
EXAMPLES
1. A skater increases her velocity from 2.0 m/s to 10.0 m/s in 3.0 seconds. What is the skater’s
acceleration?
Looking for Solution
Acceleration of the skater
The acceleration of the skater is 2.7 meters per
second per second.
Given
Beginning speed = 2.0 m/s
Final speed = 10.0 m/s
Change in time = 3 seconds
Relationship
2. A car accelerates at a rate of 3.0 m/s2. If its original speed is 8.0 m/s, how many seconds will it
take the car to reach a final speed of 25.0 m/s?
Looking for Solution
The time to reach the final speed.
`
The time for the car to reach its final speed is 5.7
seconds.
Given
Beginning speed = 8.0 m/s; Final speed = 25.0 m/s
Acceleration = 3.0 m/s2
Relationship
1. While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the
automobile’s acceleration? (Remember that a negative value indicates a slowing down or
deceleration.)
A = (V2 - V1)/T2
A = (15 m/s - 24 m/s)/12 Sec.
A = -9 m/s/12 sec.
A=
2. A parachute on a racing dragster opens and changes the speed of the car from 85 m/s to 45 m/s in
a period of 4.5 seconds. What is the acceleration of the dragster?
A=(V2-V1)/T2
A=(85m/s - 45m/s)/4.5
A= 40m/s/4.5
A=8.9m/s
3. The table below includes data for a ball rolling down a hill. Fill in the missing data values in the
table and determine the acceleration of the rolling ball.
Time (seconds) Speed (km/h)
0 (start) 0 (start)
23
76
69
88
10 15
Acceleration = _7.4_________
4. A car traveling at a speed of 30.0 m/s encounters an emergency and comes to a complete stop.
How much time will it take for the car to stop if it accelerates at -4.0 m/s2?
5. If a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds
if its starting speed were 50 mi/hr?
T=8.0m/s - 5.0m/s/5.0= 1 m/s
6. A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s2. If the cart has a
beginning speed of 2.0 m/s, what is its final speed?
T= 5.0m/s - 4.0m/s/2.0=
7. A helicopter’s speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of
this helicopter?
8. As she climbs a hill, a cyclist slows down from 25 mi/hr to 6 mi/hr in 10 seconds. What is her
deceleration?
9. A motorcycle traveling at 25 m/s accelerates at a rate of 7.0 m/s2 for 6.0 seconds. What is the
final speed of the motorcycle?
10. A car starting from rest accelerates at a rate of 8.0 m/s/s. What is its final speed at the end of 4.0
seconds?
11. After traveling for 6.0 seconds, a runner reaches a speed of 10 m/s. What is the runner’s
acceleration?
12. A cyclist accelerates at a rate of 7.0 m/s2. How long will it take the cyclist to reach a speed of 18
m/s?
13. A skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0
seconds. What is the skateboarder’s acceleration?
Article Reflection:
https://www.sciencenews.org/article/gravity-waves-black-holes-verify-einsteins-prediction?tgt=n
r
Write a 5 sentence reflection related to the article. Use evidence from the article.
QUIZ: Motion
Name: ________________________ Date:
___________
Formulas:
A= v2 −v1 V2 = V1 + (a * T) T= V2−V1
T2 a
1. After traveling for 14.0 seconds, a bicyclist reaches a speed of 89 m/s. What is the runner’s
acceleration?
2. A car starting from rest accelerates at a rate of 18.0 m/s/s. What is its final speed at the end of
5.0 seconds?
3. A cyclist accelerates at a rate of 16.0 m/s2. How long will it take the cyclist to reach a speed
of 49 m/s?
4. Hans stands at the rim of the Grand Canyon and yodels down to the bottom. He hears his
yodel back from the canyon floor 5.9 s later. Assume that the speed of sound in air is 740.0
m/s. How deep is the canyon?
5. The horse travelled 2.59 miles in 384 seconds. What was the speed of the horse in:
a. Miles per second
b. Miles per hour
6. It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be late for French class
for the third time this week. She must get from one side of the school to the other by hurrying
down three different hallways. She runs down the first hallway, a distance of 65.0 m, at a
speed of 5.2 m/s. The second hallway is filled with students, and she covers its 32.0 m length
at an average speed of 1.46 m/s. The final hallway is empty, and Suzette sprints its 60.0 m
length at a speed of 7.3 m/s.
a. Does Suzette make it to class on time or does she get detention for being late again?
b. Draw a distance vs. time graph of the situation. (Assume constant speeds for each
hallway.)
7. The tortoise and the hare are in a road race to defend the honor of their breed. The tortoise
crawls the entire 1000. m distance at a speed of 0.35 m/s while the rabbit runs the first 200.0
m at 1.85 m/s The rabbit then stops to take a nap for 1.200 hr and awakens to finish the last
800.0 m with an average speed of 4.2 m/s. Who wins the race and by how much time?
8. What is the Acceleration of the Cart on the Ramp? Determine the Angle of the Ramp (A).
Angle Chart: h ttps://drive.google.com/open?id=0B4RmhXJlHvo1YXZhcDNMSDNSMXc
Which Angle had the greatest Acceleration? Write a Conclusion based on your findings. Create
a Graph if you have time.
Height of
Ramp Velocity Velocity
2 Acceleration
(Opposite) Dist. 1 Time 1 1 Dist. 2 Time 2
50 m 45 m 9 sec. 45 m 3 sec.
50 m 60 m 15 sec. 60 m 10 sec.
Graph:
Conclusion:
QUIZ: Motion
Name: ________________________ Date:
___________
Formulas:
A= v2 −v1 V2 = V1 + (a * T) T= V2−V1
T2 a
1. After traveling for 14.0 seconds, a bicyclist reaches a speed of 89 m/s. What is the runner’s
acceleration?
2. A car starting from rest accelerates at a rate of 18.0 m/s/s. What is its final speed at the end of
5.0 seconds?
3. A cyclist accelerates at a rate of 16.0 m/s2. How long will it take the cyclist to reach a speed
of 49 m/s?
4. Hans stands at the rim of the Grand Canyon and yodels down to the bottom. He hears his
yodel back from the canyon floor 5.9 s later. Assume that the speed of sound in air is 740.0
m/s. How deep is the canyon?
5. The horse travelled 2.59 miles in 384 seconds. What was the speed of the horse in:
a. Miles per second
b. Miles per hour
6. It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be late for French class
for the third time this week. She must get from one side of the school to the other by hurrying
down three different hallways. She runs down the first hallway, a distance of 65.0 m, at a
speed of 5.2 m/s. The second hallway is filled with students, and she covers its 32.0 m length
at an average speed of 1.46 m/s. The final hallway is empty, and Suzette sprints its 60.0 m
length at a speed of 7.3 m/s.
a. Does Suzette make it to class on time or does she get detention for being late again?
b. Draw a distance vs. time graph of the situation. (Assume constant speeds for each
hallway.)
7. The tortoise and the hare are in a road race to defend the honor of their breed. The tortoise
crawls the entire 1000. m distance at a speed of 0.35 m/s while the rabbit runs the first 200.0
m at 1.85 m/s The rabbit then stops to take a nap for 1.200 hr and awakens to finish the last
800.0 m with an average speed of 4.2 m/s. Who wins the race and by how much time?
8. What is the Acceleration of the Cart on the Ramp? Determine the Angle of the Ramp (A).
Angle Chart: h ttps://drive.google.com/open?id=0B4RmhXJlHvo1YXZhcDNMSDNSMXc
Which Angle had the greatest Acceleration? Write a Conclusion based on your findings. Create
a Graph if you have time.
Height of
Ramp Velocity Velocity
2 Acceleration
(Opposite) Dist. 1 Time 1 1 Dist. 2 Time 2
50 m 45 m 9 sec. 45 m 3 sec.
50 m 60 m 15 sec. 60 m 10 sec.
Graph:
Conclusion:
Potential Energy Project
Due: Friday 3/17
Define and make note cards for the following words:
Energy: The strength Joules: The SI unit of Chemical Potential Law of
and vitality required for work or energy, equal to
sustained physical or the work done by a force Energy: Conservation of
mental activity. of one newton when its
point of application In theomatics, chemical Energy: I n physics,
moves one meter in the potential, also known as
direction of action of the partial molar free energy, the law of conservation
force is a form of potential of energy states that
energy that can be the total energy of an
absorbed or released isolated system
during chemical reaction remains constant—it is
or phrase transition. said to be conserved
over time. Energy can
neither be created nor
destroyed; rather, it
transforms from one
form to another.
Kinetic Energy: Kilojoules: Energy as Elastic Potential Gravity: t he force
that attracts a body
energy that a body kilojoules. A kilojoule is a Energy: Elastic potential toward the center of
possesses by virtue of unit of measure of energy, the earth, or toward
being in motion. in the same way that energy is Potential energy any other physical
kilometres measure stored as a result of body having mass.
distance. Food energy can deformation of an elastic For most purposes
also be measured in terms object, such as the Newton's laws of
of the nutritional or 'large' stretching of a spring. It is gravity apply, with
Calorie (Cal), which has the equal to the work done to minor modifications
same energy value as stretch the spring, which to take the general
4.186kilojoules (kJ). depends upon the spring theory of relativity
constant k as well as the into account.
distance stretched.
Potential Energy: the Gravitational Potential Mechanical
energy possessed by
a body by virtue of its Energy: Energy:Mechanical energy
position relative to
others, stresses Gravitational potential is defined as the energy of
within itself, electric energy is energy an object an object or system due to
charge, and other possesses because of its its motion or position. It is
factors. position in a gravitational the sum of the kinetic and
field. The most common potential energy of an
use of gravitational object.
potential energy is for an
object near the surface of
the Earth where the
gravitational acceleration
can be assumed to be
constant at about 9.8 m/s2.
Resource: http://www.physicsclassroom.com/class/energy/Lesson-1/Potential-Energy
Gravitational Potential Energy
Determine the Gravitational Potential Energy (GPE) of 3 different masses (g) at 3 different
heights.
3 objects: You, gallon of milk, television (research the masses)
* 2.2 lbs = 1 kg
Me: 132 LBS, 59.87 KG, 69.6 inches
PEg = mgh
PEg= (59.9) (9.8) (69.6)
PEg = 40856. 6 J
Gallon of Milk: 8.6 LBS, 3.90 KG, 10.25 Inches
PEg = mgh
PEg = (3.9)(9.8)(10.25)
PEg = 391.6J
Television: 32¨ flat screen tv 30 LBS, 13.61 KG, 15.7 inches
PEg = (13.61)(9.8)(15.7)
PEg = 2094.03J
9.8m/s Gravity
Data Table:
Object Mass Gravity Height GPE
ME 59.87 KG 9.8 m/s 69.6 Inches 40856.6 J
MILK 3.90 KG 9.8 m/s 10.25 Inches 391.6 J
TV 13.61 9.8 m/s 15.7 Inches 2094.03 J
Your data table will need: Object, mass, gravity, height, GPE
Videos: http://www.youtube.com/watch?v=x5JeLiSBqQY
*Video shows you how to use the GPE equation.
Determine the GPE of one of the masses on the following planets:
“Planet Goffin” - 17% greater than Earth’s Gravity
11.47 Gravity
“Planet Biondi” - 39% less than Earth’s Gravity
5.18 Gravity
“Planet Cabrera” - 82% greater than Earth’s Gravity
17.84 Gravity
“Planet Lopez” - 63% less than Earth’s Gravity
3.63 Gravity
FORMULA: PEg = mgh
Calculations:
Change the names below
A. Planet Goffin:
PEg= mgh
PEg= (59.87)(11.47)(69.6)
PEg= 47794.94 J
B. Planet Biondi:
PEg= mgh
PEg= (59.87)(5.18)(69.6)
PEg= 21584.81 J
C. Planet Cabrera:
PEg= mgh
PEg= (59.87)(17.84)(69.6)
PEg= 74338.42
D. Planet L opez:
PEg= mgh
PEg= (59.87)(3.63)(69.6)
PEg= 15126.04
Data Table: Mass Gravity Height GPE
ME 47794.94 J
59.87 KG 11.47 m/s 69.6 Inches 21584.81 J
Planet 59.87 KG 5.18 m/s 69.6 Inches 74338.42 J
Goffin 59.87 KG 17.84 m/s 69.6 Inches 15126.0
Biondi 59.87 KG 3.63 m/s 69.6 Inches
Cabrera
Lopez
Graph:
itical Thinking Questions:
1. What factors affect Gravitational Potential Energy?
The factors that affect an object's gravitational potential energy are its height,mass, and the
strength of the gravitational field it is in.
2. Why did the GPE change on the other planets?
The GPE changed on other because the Gravity changes on all the different planets and that is
what is changing the GPE because there are different gravities and that will change the GPE.
“To raise a mass m, you have to apply an upward force , balancing gravity, so the net force
on the body is zero and it can move upwards at a steady speed (ignoring air resistance, of
course, and assuming we gave it a tiny extra push to get it going).”M ichael Fowler
3. Which planet would you be able to hit a golf ball further? Explain using data.
Plant Lopez will be able to have a golf ball hit of it farther because it has less gravity and it will
go farther because of it will have less force on it when the gravity is less. Some data that will
prove it is Goffin 11.47 m/s gravity, Biondi 5.18 m/s gravity, Cabrera 17.84 m/s gravity, Lopez
3.63 m/s gravity. The planet with the least amount of gravity will have the golf ball go the
farthest.
4. How does GPE relate to Chemical Potential Energy?
Gravitational Potential Energy:
There is a constant attractive force between the Earth and everything surrounding it, due to
gravity.To lift something off the ground it takes energy, so just by lifting an object, that object
now has higher gravitational potential energy.
Gravitational potential energy is typically converted into kinetic energy (an object falling) before
it is converted into any other type of energy.
Chemical Potential Energy:
A chemical bond can be thought of as an attractive force between atoms.Because of this, atoms and molecules c an
have chemical potential energy.Anytime two atoms form a strong covalent or ionic bond or two
molecules form a weak van der Waals bond, chemical energy is converted into other forms of
energy, usually in the form of heat and light.The amount of energy in a bond is somewhat
counterintuitive - the stronger or more stable the bond, the less chemical energy there is
between the bonded atoms.
5. How do Energy companies use GPE to generate Electrical Energy? Give an example
Hydro electrical Power, They can be used in water like when there is a river, ocean, water fall
etc. They put a turbine in it so that when it turns it creates energy. The higher the waterfall the
more energy to power a turbine that will create energy.
6. What happens to the GPE when the object falls to the ground? Describe the Energy
transformations along the way. Use a diagram.
When the object falls to the ground there are many different things that are happening as it is
moving down towards the group some things that happen are from the start like when you let go
of the ball is the force of hand exerted on object, some other things that are used are force of
gravity exerted on object and that is what is pushing the object towards the ground. Some other
things that happen are the potential energy that can be used and energy that will be used, some
things that need to be know are the height of where the ball is dropped from and also the mass
of the object and that will play a very important role in finding out the information.
Worksheet 1:
http://glencoe.mheducation.com/sites/0078600510/student_view0/unit1/chapter4/math_practice_2.html
Worksheet 2: http://go.hrw.com/resources/go_sc/ssp/HK1MSW65.PDF
Kinetic Energy Project
Objective: 7 .1.b. Energy can be stored in many forms and can be
transformed into the energy of motion.
Problem Statement:
1. Design an experiment to test how changing the angle of a ramp affects Kinetic
Energy?
2. What is the velocity of a roller coaster at the bottom of the hill?
Hypothesis:
I think that when the angle increases or decrease then the speed of the car will increase or
decrease depending on what the angle is.
Independent Variable:
The Angle
Dependent Variable:
The Velocity
*Use the following angles: 8, 18, 28
Example: Suppose you want to make a ramp with a 23 degree angle. Look up 23
degrees on the Angle Chart and find the sine (decimal).
Sin 23 = 0.39
Substitute Sin 23 with 0.39
0.39 = opposite
hypotenuse
0.39 = opposite (height of ramp)
180 cm
solve for opposite (height of ramp)
*A ngle Chart
*Include diagrams of the 3 Angles
*Include math examples for determining the angles and KE.
Angle 8*
Sin 8 = 0.13917
Height = 0.167
Hypotenuse = 1.22
0.13917 = opposite
hypotenuse
opposite (height of ramp)
0.13917 = 180 cm
Sin 8* = opposite
hypotenuse
0.13917= x *1.2
1.2
X= 0.167m
Mgh = .5mv2
21.5g * 9.8 m/s * 0.167 = .5 * 0.167 V2
35.19 = 0.084 V2
0.084 0.084
√418.93 = V2
20.47 = V
V = D/T
V = 1.2/1.35
V = 0.88 m/s
Angle 18*
Sin 18* = 0.30902
Height = 0.370842
Hypotenuse = 1.22
0.30902 = opposite
hypotenuse
0.30902 = opposite (height of ramp)
180 cm
Sin 18* = opposite
hypotenuse
0.30902= x *1.2
1.2
X= 0.370824 m
Mgh = .5mv2
21.5g * 9.8 m/s * 0.37 = .5 * 0.37 V2
77.96 = 0.185 V2
0.185 0.185
√421.41 = V2
20.53 m/s = V
V = D/T
V = 1.2/0.8
V = 1.5 m/s
Angle 28*
Sin 28 = 0.46947
Height = 0.564
Hypotenuse = 1.22
0.46947 = opposite
hypotenuse
0.46947= opposite (height of ramp)
180 cm
Sin 28* = opposite
hypotenuse
0.46947= x *1.2
1.2
X = 0.564m
Mgh = .5mv2
21.5g * 9.8 m/s * 0.564 = .5 * 0.564 V2
118.84 = 0.282 V 2
0.282 0.282
√421.42 = V
20.53 m/s = V
V = D/V
V = 1.2/0.56
V = 2.14 m/s
Video Resources:
1. How to solve KE problems: https://www.youtube.com/watch?v=tryiwu4RhSM
2. PE/KE: h ttps://www.youtube.com/watch?v=Je8nT93dxGg
3. PE/KE: https://www.youtube.com/watch?v=BSWl_Zj-CZs
4. PE/KE: h ttps://www.youtube.com/watch?v=7K4V0NvUxRg
Data Analysis - Write your data analysis paragraph here
In conclusion, my hypothesis was correct. It states that as the angle
increases or decreases then the speed of the car will increase or
decrease depending on what the angle is. This is true because for the 8*
angle the final velocity was 0.88 m/s. Angle 18* had a final velocity of 1.5
m/s. Angle 28* had a final velocity of 2.14 m/s. That would mean that this
information supports my hypothesis.
Data Analysis Rubric (Self Evaluate) 34
Lab Rubric - Data Analysis Sections
12
Data/ ____Data is poorly ____Data is ____Data is ___Data is clearly
Observations organized or missing represented in a represented in the and accurately
altogether. table or graph, but table or graph with represented in a
No mention of it is incomplete or minor errors. More table or graph.
observations there are major complete discussion Observations
errors. Some of observations. include discussion
discussion of of both qualitative
observations and quantitative
observations.
Conclusion/ ____No conclusion is ____Somewhat ____Adequately ____Clearly explains
Analysis written in this report or it explains whether or explains whether or whether or not the
is very brief. No data is not the hypothesis not the hypothesis hypothesis was
cited. was supported. was supported. supported. Data
____No analysis is ____ Possible Data is cited to was cited to support
included or it is extremely sources of error are support hypothesis. the hypothesis.
brief no sources of error somewhat ____Possible ____Possible
are explained. explained. sources of error are sources of error are
____No discussion of ____ No discussion adequately clearly explained.
patterns or trends in the of patterns or explained.
data trends ____Some ____Trends and
discussion of Patterns in the data
patterns or trend in are clearly
the data discussed.
Self Evaluate Self Evaluate Score (1-4)
Category
3
Scientific Method
4
-Hypothesis
-Identify the variables 3
Math Examples
-Angle steps shown
-KE steps shown
Graph
-Accurate
-Informative
Data Analysis 2
3
-Hypothesis correct?
-Support for hypothesis
-Transition words
Reading Comprehension
-Article questions
Article: E veryday Energy
Read the article and answer the questions.
1. A roller coaster car at the top of the hill, an archer preparing to release an arrow, and a
lake that sits above a dam are all examples of what kind of energy?
a. Potential Energy
b. Kinetic Energy
c. Gravitational Energy
d. Consumption of Energy
2. What does the author describe in the passage?
a. The history of human energy use in the united states
b. The ways in which potential energy is converted to kinetic energy
c. The best reasons to build new dams in the american southwest
d. The consequences of drought for people who rely on dams
3. The conversion of stored potential energy into kinetic energy can also be harnessed to power
homes ,factories and entire cities. Which example from the text supports this conclusion?
A: the softball pitcher
B: the slingshotting comet
C: the archer
D: the Hoover Dam
4. Which of the following conclusions is supported by the text?
A:Nuclear power is the most efficient kind of energy for powering cities.
B: Professional athletes should study the science of energy to play better.
C: Dams power cities by converting stored potential energy into kinetic energy.
D: Drought is a serious problem for farmers in the American Southwest.
5.What is this passage mainly about?
A: The movement of comets through our solar system.
B:The scientific forces behind our favorite roller-coasters.
C: The unusual properties of water molecules in rivers.
D: The conversion of potential energy into kinetic energy.
6. Read the following sentences: “The Arizona and Nevada spillways are two means by which
the waters of Lake Mead can escape the dam. As the lake water tumbles over the walls into a
spillway, potential energy is instantly converted into kinetic energy.”
As used in the passage, what does the word “spillway mean?
A: A place where water flows over the top of a dam, creating energy.
B: A place where water accidentally spills, causing problems for engineers.
C: A place where water flows underground, into tunnels.
D:A place where water flows into nearby farms, watering crops.
7. Choose the answer that best completes the sentence below. “The conversion of stored
potential energy into kinetic energy can be harnessed to power homes, factories and entire
cities. __________, the Hoover Dam provides power to California, Nevada and Arizona.
A: Even though
B: Initially
C: For instance
D: However
8. How does the Hoover Dam provide power to California, Nevada and Arizona?
The Hoover Dam provides power to california, Nevada, Arizona by holding back the converted
potential energy of Lake Mead. Also by turbines that are housed within the power plants at the
base of the dam.
9. What two factors determine the energy production of the Hoover Dam?
The two factors that determine the energy production of the Hoover Dam are how much water is
required downriver from the dam, The water levels of Lake Mead that were determined by the
energy production of the Hoover Dam.
10. Explain why the prolonged period of drought (a time where there is little rain, and little water
flowing into rivers and lakes) would cause the Hoover Dam to generate much less energy since
2009. Use evidence from the text to support your answer.
The prolonged period of a drought would cause the Hoover Dam to generate much less
energy since 2009 would mean that the lake will have less water, When the lake has less water
, then there will be less potential energy stored in lake mead. Some evidence that I found in the
text was that “ The greatest amount of energy was produced during 1984; a year after floods
brought the lake to its highest levels. As of 2009 the American Southwest has entered a
prolonged period of seasonal droughts. As a result, compared to its peak periods of energy
production, the Hoover Dam has been recently generating much less energy.” this evidence
supports what I said by the levels of water change the amount of energy that is being used.
FINAL PART - Roller Coaster Physics
Objective:
1. When energy is transformed, the total amount of energy stays constant (is conserved).
2. Work is done to lift an object, giving it gravitational potential energy (weight x height). The
gravitational potential energy of an object moving down a hill is transformed into kinetic
energy as it moves, reaching maximum kinetic energy at the bottom of the hill.
Determine the velocity of a full roller coaster of riders at the bottom of the largest hill. You can
use the following roller coasters:
Watch these Videos for help:
http://www.youtube.com/watch?v=Je8nT93dxGg
http://www.youtube.com/watch?v=iYEWIuQBVyg
Use either:
GPE t op = KE bottom
1. Cyclone - Coney Island
Height of largest hill -
Mass of Coaster/number of riders -
Velocity at Bottom of Hill in m/s -
GPE top = KE bottom
2. SUPERMAN: RIDE OF STEEL or BIZARRO
Height of largest hill: 221 FT
Mass of Coaster/number of riders- 3 6 riders per train, 25,000 pounds per train (2 Trains), Full
train with people 5400 Pounds
Velocity at Bottom of Hill in m/s -
M*G*H = .5mv2
11339.8 kg * 9.8 m/s * 221 FT = .5 * 11339.8 kg V2
24559758.3 = 5669.91 * V2
5669.91 5669.91
√4331.59 = √V 2
65.81 m/s = V
FULL TRAIN OF PEOPLE
M*G*H = .5mv2
13789.19 kg * 9.8 m/s * 221 FT = .5 * 13789.19 kg V2
29864627.702 = 6894.595 * V2
6894.595 6894.595
√4331.6 = √V 2
65.814 m/s = V
*Write about your results in a paragraph.
Something that I found out was the differences between the velocities with the people in the
cars and with empty car ride, They are very close to the same velocities even though there are
different numbers that are involved. The velocity of the empty cars was 65.81 m/s and the
velocity of the full car was 65.814 m/s and there is close to no difference in the velocities and
that is either showing that the people do not make a difference in the velocities or I got the
wrong velocities. I think that the people do not matter in the velocities because they will go the
same speeds if they have people in them. If there are lighter or heavier people in the ride that
will change the whole experiment and that could also change the velocity of the car with people
in it.
More resources:
http://www.youtube.com/watch?v=BSWl_Zj-CZs
Kinetic and Potential Energy
http://www.youtube.com/watch?v=7K4V0NvUxRg
Kinetic and Potential Energy
http://www.youtube.com/watch?v=btLU2lb3-xs
Bill Nye
http://www.youtube.com/watch?v=-dpBVtAbKJU
Roller Coasters
http://www.youtube.com/watch?v=iYEWIuQBVyg
K inetic Energy Project
Objective: 7.1.b. Energy can be stored in many forms and can be
transformed into the energy of motion.
Problem Statement:
1. Design an experiment to test how changing the angle of a ramp affects Kinetic
Energy?
2. What is the velocity of a roller coaster at the bottom of the hill?
Hypothesis:
I think that when the angle increases or decrease then the speed of the car will increase or
decrease depending on what the angle is.
Independent Variable:
The Angle
Dependent Variable:
The Velocity
*Use the following angles: 8, 18, 28
Example: Suppose you want to make a ramp with a 23 degree angle. Look up 23
degrees on the Angle Chart and find the sine (decimal).
Sin 23 = 0.39
Substitute Sin 23 with 0.39
0.39 = opposite
hypotenuse
0.39 = opposite (height of ramp)
180 cm
solve for opposite (height of ramp)
*A ngle Chart
*Include diagrams of the 3 Angles
*Include math examples for determining the angles and KE.
Angle 8*
Sin 8 = 0.13917
Height = 0.167
Hypotenuse = 1.22
0.13917 = opposite
hypotenuse
0.13917 = opposite (height of ramp)
180 cm
Sin 8* = opposite
hypotenuse
0.13917= x *1.2
1.2
X= 0.167m
Mgh = .5mv2
21.5g * 9.8 m/s * 0.167 = .5 * 0.167 V2
35.19 = 0.084 V2
0.084 0.084
√418.93 = V2
20.47 = V
V = D/T
V = 1.2/1.35
V = 0.88 m/s
Angle 18*
Sin 18* = 0.30902
Height = 0.370842
Hypotenuse = 1.22
0.30902 = opposite
hypotenuse
0.30902 = opposite (height of ramp)
180 cm
Sin 18* = opposite
hypotenuse
0.30902= x *1.2
1.2
X= 0.370824 m
Mgh = .5mv2
21.5g * 9.8 m/s * 0.37 = .5 * 0.37 V2
77.96 = 0.185 V2
0.185 0.185
√421.41 = V2
20.53 m/s = V
V = D/T
V = 1.2/0.8
V = 1.5 m/s
Angle 28*
Sin 28 = 0.46947
Height = 0.564
Hypotenuse = 1.22
0.46947 = opposite
hypotenuse
0.46947= opposite (height of ramp)
180 cm
Sin 28* = opposite
hypotenuse
0.46947= x *1.2
1.2
X = 0.564m
Mgh = .5mv2
21.5g * 9.8 m/s * 0.564 = .5 * 0.564 V2
118.84 = 0.282 V 2
0.282 0.282
√421.42 = V
20.53 m/s = V
V = D/V
V = 1.2/0.56
V = 2.14 m/s
Video Resources:
1. How to solve KE problems: https://www.youtube.com/watch?v=tryiwu4RhSM
2. PE/KE: https://www.youtube.com/watch?v=Je8nT93dxGg
3. PE/KE: https://www.youtube.com/watch?v=BSWl_Zj-CZs
4. PE/KE: https://www.youtube.com/watch?v=7K4V0NvUxRg
Data Analysis - Write your data analysis paragraph here
In conclusion, my hypothesis was correct. It states that as the angle
increases or decreases then the speed of the car will increase or
decrease depending on what the angle is. This is true because for the 8*
angle the final velocity was 0.88 m/s. Angle 18* had a final velocity of 1.5
m/s. Angle 28* had a final velocity of 2.14 m/s. That would mean that this
information supports my hypothesis.
Data Analysis Rubric (Self Evaluate) 34
Lab Rubric - Data Analysis Sections
12
Data/ ____Data is poorly ____Data is ____Data is ___Data is clearly
Observations organized or missing represented in a represented in the and accurately
altogether. table or graph, but table or graph with represented in a
No mention of it is incomplete or minor errors. More table or graph.
observations there are major complete discussion Observations
errors. Some of observations. include discussion
discussion of of both qualitative
observations and quantitative
observations.
Conclusion/ ____No conclusion is ____Somewhat ____Adequately ____Clearly explains
Analysis written in this report or it explains whether or explains whether or whether or not the
is very brief. No data is not the hypothesis not the hypothesis hypothesis was
cited. was supported. was supported. supported. Data
____No analysis is ____ Possible Data is cited to was cited to support
included or it is extremely sources of error are support hypothesis. the hypothesis.
brief no sources of error somewhat ____Possible ____Possible
are explained. explained. sources of error are sources of error are
____No discussion of ____ No discussion adequately clearly explained.
patterns or trends in the of patterns or explained.
data trends ____Some ____Trends and
discussion of Patterns in the data
patterns or trend in are clearly
the data discussed.
Self Evaluate Self Evaluate Score (1-4)
Category
3
Scientific Method
4
-Hypothesis 3
-Identify the variables 2
Math Examples 3
-Angle steps shown
-KE steps shown
Graph
-Accurate
-Informative
Data Analysis
-Hypothesis correct?
-Support for hypothesis
-Transition words
Reading Comprehension
-Article questions
Article: E veryday Energy
Read the article and answer the questions.
1. A roller coaster car at the top of the hill, an archer preparing to release an arrow, and a
lake that sits above a dam are all examples of what kind of energy?
a. Potential Energy
b. Kinetic Energy
c. Gravitational Energy
d. Consumption of Energy
2. What does the author describe in the passage?
a. The history of human energy use in the united states
b. The ways in which potential energy is converted to kinetic energy
c. The best reasons to build new dams in the american southwest
d. The consequences of drought for people who rely on dams
3. The conversion of stored potential energy into kinetic energy can also be harnessed to power
homes ,factories and entire cities. Which example from the text supports this conclusion?
A: the softball pitcher
B: the slingshotting comet
C: the archer
D: the Hoover Dam
4. Which of the following conclusions is supported by the text?
A:Nuclear power is the most efficient kind of energy for powering cities.
B: Professional athletes should study the science of energy to play better.
C: Dams power cities by converting stored potential energy into kinetic energy.
D: Drought is a serious problem for farmers in the American Southwest.
5.What is this passage mainly about?
A: The movement of comets through our solar system.
B:The scientific forces behind our favorite roller-coasters.
C: The unusual properties of water molecules in rivers.
D: The conversion of potential energy into kinetic energy.
6. Read the following sentences: “The Arizona and Nevada spillways are two means by which
the waters of Lake Mead can escape the dam. As the lake water tumbles over the walls into a
spillway, potential energy is instantly converted into kinetic energy.”
As used in the passage, what does the word “spillway mean?
A: A place where water flows over the top of a dam, creating energy.
B: A place where water accidentally spills, causing problems for engineers.
C: A place where water flows underground, into tunnels.
D:A place where water flows into nearby farms, watering crops.
7. Choose the answer that best completes the sentence below. “The conversion of stored
potential energy into kinetic energy can be harnessed to power homes, factories and entire
cities. __________, the Hoover Dam provides power to California, Nevada and Arizona.
A: Even though
B: Initially
C: For instance
D: However
8. How does the Hoover Dam provide power to California, Nevada and Arizona?
The Hoover Dam provides power to california, Nevada, Arizona by holding back the converted
potential energy of Lake Mead. Also by turbines that are housed within the power plants at the
base of the dam.
9. What two factors determine the energy production of the Hoover Dam?
The two factors that determine the energy production of the Hoover Dam are how much water is
required downriver from the dam, The water levels of Lake Mead that were determined by the
energy production of the Hoover Dam.
10. Explain why the prolonged period of drought (a time where there is little rain, and little water
flowing into rivers and lakes) would cause the Hoover Dam to generate much less energy since
2009. Use evidence from the text to support your answer.
The prolonged period of a drought would cause the Hoover Dam to generate much less
energy since 2009 would mean that the lake will have less water, When the lake has less water
, then there will be less potential energy stored in lake mead. Some evidence that I found in the
text was that “The greatest amount of energy was produced during 1984; a year after floods
brought the lake to its highest levels. As of 2009 the American Southwest has entered a
prolonged period of seasonal droughts. As a result, compared to its peak periods of energy
production, the Hoover Dam has been recently generating much less energy.” this evidence
supports what I said by the levels of water change the amount of energy that is being used.
FINAL PART - Roller Coaster Physics
Objective:
1. When energy is transformed, the total amount of energy stays constant (is conserved).
2. Work is done to lift an object, giving it gravitational potential energy (weight x height). The
gravitational potential energy of an object moving down a hill is transformed into kinetic
energy as it moves, reaching maximum kinetic energy at the bottom of the hill.
Determine the velocity of a full roller coaster of riders at the bottom of the largest hill. You can
use the following roller coasters:
Watch these Videos for help:
http://www.youtube.com/watch?v=Je8nT93dxGg
http://www.youtube.com/watch?v=iYEWIuQBVyg
Use either:
GPE top = KE bottom
1. Cyclone - Coney Island
Height of largest hill -
Mass of Coaster/number of riders -
Velocity at Bottom of Hill in m/s -
GPE t op = KE bottom
2. SUPERMAN: RIDE OF STEEL or BIZARRO
Height of largest hill: 221 FT
Mass of Coaster/number of riders- 3 6 riders per train, 25,000 pounds per train (2 Trains), Full
train with people 5400 Pounds
Velocity at Bottom of Hill in m/s -
M*G*H = .5mv2
11339.8 kg * 9.8 m/s * 221 FT = .5 * 11339.8 kg V2
24559758.3 = 5669.91 * V2
5669.91 5669.91
√4331.59 = √V 2
65.81 m/s = V
FULL TRAIN OF PEOPLE
M*G*H = .5mv2
13789.19 kg * 9.8 m/s * 221 FT = .5 * 13789.19 kg V2
29864627.702 = 6894.595 * V2
6894.595 6894.595
√4331.6 = √V 2
65.814 m/s = V
*Write about your results in a paragraph.
Something that I found out was the differences between the velocities with the people in the
cars and with empty car ride, They are very close to the same velocities even though there are
different numbers that are involved. The velocity of the empty cars was 65.81 m/s and the
velocity of the full car was 65.814 m/s and there is close to no difference in the velocities and
that is either showing that the people do not make a difference in the velocities or I got the
wrong velocities. I think that the people do not matter in the velocities because they will go the
same speeds if they have people in them. If there are lighter or heavier people in the ride that
will change the whole experiment and that could also change the velocity of the car with people
in it.
More resources:
http://www.youtube.com/watch?v=BSWl_Zj-CZs
Kinetic and Potential Energy
http://www.youtube.com/watch?v=7K4V0NvUxRg
Kinetic and Potential Energy
http://www.youtube.com/watch?v=btLU2lb3-xs
Bill Nye
http://www.youtube.com/watch?v=-dpBVtAbKJU
Roller Coasters
http://www.youtube.com/watch?v=iYEWIuQBVyg
QUIZ: Inclined Plane
Directions: A nalyze the Inclined Plane Data Table that is shared on
Classroom and determine which machine has the greatest Actual
Mechanical Advantage (AMA).
Problem Statement:
How does the angle of an inclined plane affect the Mechanical
Advantage?
Hypothesis: ( Use proper form!)
If, the angle of the inclined plane increases or decreases then, the mechanical
advantage will either increase or decrease depending on what the inclined plane is
doing.
Diagrams of Inclined Planes: (Label Diagrams)
Angle Chart: h ttps://drive.google.com/open?id=0B4RmhXJlHvo1YXZhcDNMSDNSMXc
Calculations (Examples):
IMA AMA Efficiency
Work Output/Work Input*100
Input Distance(Effort)/Output Output Force/Input 210/300*100 = 70%
Distance(Height) Force(Effort)
150/210 = 0.714 7/2 = 3.5 Efficiency
Work Output/Work Input*100
IMA AMA
Input Distance(Effort)/Output Output Force/Input
Distance(Height) Force(Effort) 210/200*100 = 105%
50/210 = 0.238 7/4 = 1.75
Graph: ( Angle and Mechanical Advantage)
Conclusion:
Option #1 Write a Conclusion.
***Your conclusion must also address which machine would be impossible
and why?
In conclusion, my hypothesis was right because when the inclined planes
angle increased or decreased it caused the AMA to increase or decrease
depending on the angle of the inclined plane. Some examples are when
the angles input force was 2 the AMA was 3.5 and when the input force
was 4 the AMA was 1.75 and the output force stayed the same. The
machine that would be impossible would be the Mechanical Advantage
(AMA) because the force that was produced by the machine to the force
that was applied to it, was not used and the AMA changed the angle of
the inclined plane because when it increases it also increases the angle
of the the inclined plane changing and affecting the AMA.
Option #2 Building
Compare 2 famous buildings based on the following Inclined Plane Data.
A builder wanted to get a 60 kg bag of concrete to the top of the 2
buildings.
1. What would the length of the ramp be if the machine has:
IMA - 5.9
AMA - 3.7
2. What are the angles of the ramps?
3. Using Work Input and Output, what is the efficiency of the machines?
Rubric
Lab Rubric - Data Analysis Sections
1 234
Data/ ____Data is poorly ____Data is ____Data is ___Data is clearly
Observations organized or missing represented in a represented in the and accurately
altogether. table or graph, but table or graph with represented in a
No mention of it is incomplete or minor errors. More table or graph.
observations there are major complete discussion Observations
errors. Some of observations. include discussion
discussion of of both qualitative
observations and quantitative
observations.
Conclusion/ ____No conclusion is ____Somewhat ____Adequately ____Clearly explains
Analysis written in this report or it explains whether or explains whether or whether or not the
is very brief. No data is not the hypothesis not the hypothesis hypothesis was
cited. was supported. was supported. supported. Data
____No analysis is ____ Possible Data is cited to was cited to support
included or it is extremely sources of error are support hypothesis. the hypothesis.
brief no sources of error somewhat ____Possible ____Possible
are explained. explained. sources of error are sources of error are
____No discussion of ____ No discussion adequately clearly explained.
patterns or trends in the of patterns or explained.
data trends ____Some ____Trends and
discussion of Patterns in the data
patterns or trend in are clearly
the data discussed.
Thermal (Heat) Energy Project
Chapter 6 (pg. 156-180)
DUE: Friday May 16th
1. Vocabulary - Define and make note cards
Conduction Heat Insulator Calorie
the process by which the quality of being a thing or substance either of two units of
heat or electricity is hot; high used for insulation, in heat energy.the
directly transmitted temperature. particular.a energy needed to
through a substance substance that does raise the temperature
when there is a not readily allow the of 1 gram of water
difference of passage of heat or through 1 °C (now
temperature or of sound. usually defined as
electrical potential 4.1868 joules).
between adjoining
regions, without
movement of the
material.
Convection Temperature Second Law of Turbine
Thermodynamics A turbine is a
the movement the degree or turbomachine with
caused within a fluid intensity of heat the branch of at least one moving
by the tendency of present in a physical science that part called a rotor
hotter and therefore substance or object, deals with the assembly, which is
less dense material especially as relations between a shaft or drum with
to rise, and colder, expressed according heat and other forms blades attached.
denser material to to a comparative of energy (such as Moving fluid acts on
sink under the scale and shown by a mechanical, the blades so that
influence of gravity, thermometer or electrical, or chemical they move and
which consequently perceived by touch. energy), and, by impart rotational
results in transfer of extension, of the energy to the rotor.
heat. relationships between
all forms of energy.
Radiation Heat Engine Specific Heat Generator
the emission of a device for the heat required to a thing that generates
energy as producing motive raise the temperature something, in
electromagnetic power from heat, of the unit mass of a particular.a dynamo
waves or as moving such as a gasoline given substance by a or similar machine for
subatomic particles, engine or steam given amount converting
especially engine. (usually one degree). mechanical energy
high-energy particles into electricity.
that cause ionization.
First Law of Conductor Kinetic Energy
Thermodynamics In physics and
electrical energy that a body
the branch of engineering, a possesses by virtue
physical science that conductor is an of being in motion.
deals with the object or type of
relations between material that allows
heat and other forms the flow of an
of energy (such as electrical current in
mechanical, one or more
electrical, or chemical directions.
energy), and, by Materials made of
extension, of the metal are common
relationships between electrical
all forms of energy. conductors.
2. Provide a diagram showing molecular motion in Solids, Liquids, and gases.
*How are they different?
They all have different ways that they move and they all have different ways of
being together. They all have different arrangement like Regular arrangement,
Randomly arranged, Randomly arranged.
3. Discuss the energy needed to change a 15 gram ice cube into steam. Use a
graph and one calculation from our unit on Phase Changes.
4. What is the difference between Heat and Temperature? Provide a definition,
picture and video link to help you review.
Heat is the quality of being hot; high temperature. While temperature is the
degree or intensity of heat present in a substance or object, especially as
expressed according to a comparative scale and shown by a thermometer or
perceived by touch.
Video: https://www.youtube.com/watch?v=lsJFdOJMXrM
5. Construct a graph showing the average monthly temperatures in Hartford, CT.,
a city on the equator and a city in the Southern Hemisphere.
Questions:
1. What do you notice about the temperatures?
I notice that the temperatures are at least a 10 degree difference and none of the
temperatures are the same and none of them
2. How is heat transferred throughout the Earth?
Energy is transferred between the earth's surface and the atmosphere via
conduction, convection, and radiation. Conduction is the process by which heat energy
is transmitted through contact with neighboring molecules.
4. How is Steam used to create electricity in Power Plants?
A. Coal Plant
B. Natural Gas Plant
C. Nuclear Plant
D. Where did Fossil Fuels originate?
There are three major forms of fossil fuels: coal, oil and natural gas. All three were
formed many hundreds of millions of years ago before the time of the dinosaurs –
hence the name f ossil fuels. The age they were formed is called the
Carboniferous Period. It was part of the Paleozoic Era.
E. What is the difference between Renewable and NonRenewable forms of energy?
There are nine major areas of energy resources. They fall into two
categories:nonrenewable and renewable. Nonrenewable energy resources, like coal,
nuclear, oil, and natural gas, are available in limited supplies. This is usually due to the
long time it takes for them to be replenished.
Practice Calculation
1. How much heat was gained by a 50 g sample of Orange Juice that increased its
temperature from 35 C to 75 C?
Heat = M * T * SH
H = 50g * 75* - 25* * 1cal/g*C
H = 50g * 50 * 1cal/g*C
H = 3725 * 1cal/g*C
H= 3725 cal/g*C
2. How much heat was gained by a 350 g sample of Vegetable oil that increased its
temperature from 24 C to 95 C?
Lopez Lab
Water (32 - 23) Oil (39-23)
Heat = M * T * SH
H = 350 * 95* - 24* *1cal/g*C
H = 350 * 71 * 1cal/g*C
H = 24850 * 1cal/g*C
H = 24850 cal/g*C
Heat = M * T * SH
H = 350 * 32* - 23* * 1cal/g*C
H = 350 * 9 * 1cal/g*C
H = 3150 * 1cal/g*C
H = 3150 cal/g*C
Heat = M * T * SH
H = 350 * 39* - 23* * 1cal/g*C
H = 350 * 16 * 1cal/g*C
H = 5600 * 1cal/g*C
H = 5600 cal/g*C
http://www.kentchemistry.com/links/Energy/SpecificHeat.htm
Use this to help solve problems
Critical Thinking - Choose 2 out of 3 to research
Provide pictures
1. How did NASA protect the astronauts in their space vehicles from the harmful
radiation from space?
2. How is your home insulated? Research the “R” value system for insulation.
R-Values. An i nsulating material's resistance to conductive heat flow is measured or
rated in terms of its thermal resistance or R - value -- the higher the R-value, the greater
the insulating effectiveness. T he R- v alue depends on the type of insulation, its
thickness, and its density.
3. How does the atmosphere act as an insulator?
https://www.ucar.edu/learn/1_3_1.htm
Experiment: May 22, 2017
Nut Temp 1 Temp 2 Temp Change
12* C
Almond 17* C 29* C 27* C
32* C
Cashew 29* C 56* C
Pecan 53* C 81* C
Mass
Almond: 0.5g
Cashew: 1.5g
Pecan: 2g
Chart:
8. SPECIFIC HEAT WORKSHEET
WORKSHEET LINK - Use this worksheet and show your work
Use this website for examples
http://www.kentchemistry.com/links/Energy/SpecificHeat.htm
9. TEST REVIEW
Scientific Method
What is your name? *
Your answer
What is your science class? *
2
3
4
7
1. Identify the Independent Variable in the attached
experiment. *
Link:
https://docs.google.com/document/d/1ZtsKUWwWgA1K5-a-DFDZJx7amMvjtLcUvjltWUUsLg
M/edit
Density
Eggs hatched
Temperature
Type of Fish
2. Identify the Dependent Variable in the attached experiment.
Link:
https://docs.google.com/document/d/1BYoJZ8XMNiW5XdAboDXbKP4is_uyu6bPzK81I5g33v
g/edit
Speed of Car
Mass of Car
Miles per Gallon
Price of Car
3. The ____________ is an example of a Constant in the
attached experiment. *
Link:
https://docs.google.com/document/d/1gl2ruwA3dt3xuPHi5JXebV5wIourqhHwxyWHszgA7Z0/
edit
Temperature of Mouthwash
Time Mouthwash is in Mouth
Bacteria
Density
4. What should be graphed on the X-axis? *
Link:
https://docs.google.com/document/d/1ZtsKUWwWgA1K5-a-DFDZJx7amMvjtLcUvjltWUUsLg
M/edit
Eggs Hatched
Temperature
Type of Fish
Density
5. What should be graphed on the Y-axis? *
Link:
https://docs.google.com/document/d/1ZtsKUWwWgA1K5-a-DFDZJx7amMvjtLcUvjltWUUsLg
M/edit
Temperature
Eggs Hatched
Density
Type of Fish
6. What Conclusion can you draw from the data in the graph?
Link:
https://docs.google.com/document/d/1gl2ruwA3dt3xuPHi5JXebV5wIourqhHwxyWHszgA7Z0/
edit
Brand A is the best mouthwash
Brand B is the best mouthwash
Brand C is the best mouthwash
Brand D is the best mouthwash
7. A gas has a volume of 4.52 L. If its mass is 8.05 g, what is
the identity of the gas? *
Chart:
https://docs.google.com/spreadsheets/d/1BDw_sBsnlIum0dZbUNOKfV2Nk8yJ4GTJ84Zod2P
2nOs/edit#gid=0
helium
neon
argon
Krypton
8. 89,000 mg = _______ g *
Your answer
9. 49 km = _________ m *
Your answer
10. 16,500 ml = ____________ L *
Your answer
11. What is the % Error for the Lead Trial in the following
data?? *
Link:
https://docs.google.com/spreadsheets/d/1XbvBkKix95CB-IBkt_X8QL2Y-SAJujoY_AySOxNicJ
8/edit#gid=0
Your answer
12. Which one of the following pictures is NOT an example of
a Heterogeneous Mixture? *
Link:
https://docs.google.com/document/d/1M5J4bZKZJSAx6rDQ7vGq4OmtzyDjVDqRqYnJYmS14
Eo/edit
A
B
C
D
13. Which one of the following pictures is NOT an example of
a Homogeneous Mixture? *
Link:
https://docs.google.com/document/d/1gOHEIbov0L--ddmsGdHemgdNOhpE0MAQlndP8gS3A
EU/edit
A
B
C
D
14. Analyze the following Data: What is the % of Large rocks
in the following mixture? *
Link:
https://docs.google.com/spreadsheets/d/1qkC_P48RP3zkuT9QpBbcOa-0s5Tp37jhvvPn_6hiw
rc/edit#gid=0
Your answer
15. Suppose the Heterogeneous Mixture from the previous
mixture has an increase of 23% of Sand. What would be the
new Mass (g) of Sand in the Mixture? *
Link:
https://docs.google.com/spreadsheets/d/1qkC_P48RP3zkuT9QpBbcOa-0s5Tp37jhvvPn_6hiw
rc/edit#gid=0
Your answer
16. What is different about the 2 Pie Charts? (Mixture and
Compound) *
Link:
https://docs.google.com/spreadsheets/d/19PV9rpQ39F5i_Z-QDgLrVDZ1d-V2GyRVs-9slfk3_v4
/edit#gid=0
Heterogeneous Mixtures always have the same % of materials while
compounds do not
Heterogeneous all have different %s of materials while Compounds have
the same
Both always have the same % of materials
Compounds are just like mixtures
17. Identify the Solute in the following Picture. *
Link:
https://docs.google.com/document/d/1aVdnxFHhD1UBfbu5Ok99VN7bdD8H9aPgwAunLBkNG
Rk/edit
Water
Salt
Rocks
Glass
18. Analyze the following Solubility Graph: A mass of 80 g of
NaNO3 is dissolved in 100 g of water at 10 ºC. The solution is
heated to 40ºC. How many more grams of Sodium nitrate
must be added to make the solution saturated? *
Link:
https://docs.google.com/document/d/1oFJxzxtzO5_LULoKG5c5oj3_xaOCJ8dvbrGkLGlnmc4/
edit
Your answer
19. Analyze the solubility graph: Which is more soluble at 40
C? KNO3 or KClO3 *
Link:
https://docs.google.com/document/d/1jLRtQgWn40cEpe1fN2vzjY352lc-dghUfL4bdH4_0fI/edit
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