Show:
Motion
Work and Energy
Heat and Temperature
Sound
Light
100
Does the following object have momentum? a rock by the side of the road
No
100
What are the units of work?
Joules
100
Temperature is measured with a _____________.
thermometer
100
True or False: Sound waves require a medium.
True
100
True or False: Light waves require a medium.
False
200
True or False: Action-reaction forces are always equal.
True
200
In a first-class lever, where is the fulcrum located?
in the middle
200
As kinetic energy in a substance increases, temperature _____________.
increases
200
What type of waves are sound waves?
longitudinal waves
200
What type of waves are light waves?
transverse waves
300
When objects are moved further apart from each other, the force of gravity __________.
decreases
300
What are the three units of power?
watts, horsepower, joules per second
300
What are the three types of energy transfer?
conduction, convection, radiation
300
What does the frequency of sound waves determine?
the pitch of the sound
300
The color of light is determined by ________________ of the light waves.
the frequency
400
What is the unbalanced force the slows down a ball rolling across the floor?
the force of friction
400
What is the primary source of the sun's energy?
nuclear fusion
400
On the Fahrenheit scale, what are the boiling and freezing points of water?
212* and 32*
400
The intensity of a sound describes__________________.
its loudness at a particular distance
400
The amount of energy in a photon of light is proportional to the ___________________.
frequency of the corresponding light wave.
500
What does Newton's third law state?
For every action force there is an equal and opposite reaction force.
500
What is the mechanical advantage of a ramp that is 10 meters long and 2 meters high?
5
500
In an air conditioner, when a substance evaporates, what does it do to the surrounding air?
it absorbs energy as heat from the surrounding air
500
What is resonance?
vibration of one object causes another object to vibrate at natural frequencies
500
What happens when light rays reflect off a rough surface?
they scatter in many different directions