waves energy force and motion universe velocity and acceleration
TRANSCRIPT
Waves
Energy
Force and Motion
Universe
Velocity and acceleration
Random
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1 - 100
In a longitudinal/ compression waves the motion of the medium is _____________ to the motion of the waves
一丁目1 - 1001 - 100
Parallel
1-200
What are the differences between radio waves and gamma rays?
1 - 100
Radio waves= long wavelength, low energy, low frequency
Gamma rays= short wavelength, high energy, high frequency
A sound wave cannot be transmitted through a __________
1 - 100
vaccum
In a compressional wave, motion of the medium is ________ to the motion of the wave.
1 - 100
Parallel
1-500
If the wavelength of a wave is 10 meters and it takes 2 seconds for every crest to pass. What is the velocity of the wave?
1 - 100
5 meters per second
2-100
1 - 100
Heat transfers from ______ object to _______
1 - 100
Warm object to cold object
2-200Rubbing two things together is an example of converting ___________ energy to ___________ energy
1 - 100
Mechanical energy to thermal energy
What is the potential energy of a 100kg person standing 10 meters above the surface?
けっこん式
9800 Joules
All of these will increase kinetic energy except:A.Increase mass B.Increase velocityC.Increase heightD.Decrease friction
1 - 100
C
2-500A pot sitting on a hot burner is an example of what kind of heat transfer?
1 - 100
Conduction
1 - 100When you push a penny across a long table, the penny comes to a stop. What force brings the penny to a stop?
1 - 100
Friction
Soccer ball is 500gBasketball is 700g
You kick a soccer ball and a basketball with equal force. Compare the soccer ball and basketball in terms of acceleration
1 - 100
Soccer ball will accelerate faster than a basketball because it has less mass
3-300It takes a certain force to accelerate a rollercoaster cart at 5m/s/s. How much force would it take to accelerate a cart half the mass to 5 m/s/s
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Half as much force
What is the net force?
300N 1,000N
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700N to the right
3-500As you sit on a chair, the force of gravity acts downward on your body. The reaction force is _________________
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Force of the chair pushing you upward
4-1001 - 100What are two
factors that affect the amount of gravitational force
1 - 100
Mass and distance
4-200During this process, a heavy element is broken down into lighter elements
4-200A1 - 100
Nuclear fission
4-300What are the evidences supporting the Big Bang Theory?
4-300A1 - 100-Universe is expanding
(red shift)-Cosmic Background Radiation-Abundance of hydrogen
This force keeps the moon in orbit around the earth
4-400A1 - 100
Gravitational Force
4-500What is nuclear fusion? Give an example
4-500A1 - 1004 hydrogen combine to
form 1 helium. It produces large amount of heat and light. Ex: Stars and Supernova
1 - 100A car travel from Columbus to Akron, a distance of about 200km in 2 hours.
The car’s average speed is..
5-100A1 - 100
V=d/tV=200/2V=100km/h
5-200If the net force acting on a 200 kg object is 4000N, what is the object’s acceleration
5-200A1 - 100
A=F/m A=4000N/200kgA=20m/s/s
5-300
At which point is the object at rest?
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5-400
Acceleration can be change in ________ and change in ___________
5-400A1 - 100
1. Velocity and Direction
5-500
Describe the object’s motion
5-500A1 - 1001. Accelerate away from the origin
2. Move at a constant velocity3. Slow down (negative
acceleration) and stop for an instant
4. Turn back and accelerate the other way
5. Move at a constant velocity6. Slow down (negative
acceleration)
6-1001 - 100
Compared to wave X, which statement is correct?A.Wave Y has greater speed.B.Wave Y has less energy.C.Wave Y has a lower frequency.D.Wave Y has a shorter wavelength.
6-100A1 - 100
D
6-200If a person weighs 600N and he is lifted up to 3 meters what is the gravitational potential energy?
6-200A1 - 100GPE=mgh
GPE=weight x hGPE=600N x 3mGPE= 1800J
6-300
What are the missing terms
6-300A1 - 100
6-400
During which time interval did the person have the greatest velocity?
6-400A1 - 100From 1 to 3
seconds
6-500What keeps the rocket moving at a constant rate
A.InertiaB.Unbalanced forcesC.GravityD.Sheer will
6-500A1 - 100A. Inertia
2-500