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# Energy test

What is a wave? A disturbance that transfers energy.
What is a medium? A material through which a wave can travel.
What is a transverse wave? Particles that move perpendicularly to the one direction the wave travels.
What is a Crest? The point where the wave is at its highest.
What is a trough? The point where the wave is at its lowest.
What is longitudinal wave? When particles move back and forth in the same direction a wave travels.
What is compression? When energy is transfered from one end of the spring to the other.
What is rarefaction? When the energy of the spring spreads the coils apart.
What are electromagnetic waves? Any wave that can travel without a medium.
What are mechanical waves? Waves that require a medium.
What is amplitude? The measurement of how far particles in the medium move.
What is wave Speed? Is the speed that waves travel.
What is a wavelength? The distance from any point in a given time.
What is force? A push or a pull exerted on an object in order to change the motion of the object.
What is frequency? The number of waves that pass a point in a given time.
What is work? The use of force to move an object some distance. work= force x distance
What is hertz? Is the measurement of frequency. One hertz is equal to one wavelength per second.
What is power? The ability to do something or act in a particular way.
A book weighing 1.0 newton is lifted 2 meters . How much work is done? W=FxD 2j
A set of pulleys is used to lift a piano weighing 1000 newton's. The piano was lifted 3 meters in 60 sec. How much power was used? Power=50 watts
If you have an empty fish tank and a tank full of water, which one would allow a voice to travel faster? The tank full of water,
If a drop of water lands in a body of water, it forms a surface wave, which is a combination of _______ and ________waves. Transverse (perpendicular to the direction of the wave traveling) and longitudinal (back and forth) waves.
If a noisy toy is placed inside an airtight glass container, would you be able to hear a sound? No, because there is no air to transmit the sound.
If the distance between the crest and the trough of the wave are increased, would the wave frequency increase or decrease? Increase
What is an example of modeling the way a disturbance travels through a medium? Fans in a stadium doing "the Wave."
If the speed of sound at 20 degrees C is 340 m/s, how long is the wavelength of an elephant call at a frequency of 5 cycles per second? The wavelength = 68
Created by: jordan koller