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Ch. 10 Test Waves
| Question | Answer |
|---|---|
| a disturbance that transmits energy through matter or through space | wave |
| a ( ) is NOT mad of ( ) | wave, matter |
| waves ( ) involve matter, but not all do | might |
| even when they involve ( ) the ( ) is NOT transmitted from one ( ) to another | matter, matter, place |
| waves that require matter to travel though | mechanical waves |
| the matter that a mechanical wave travels through | medium |
| examples of mechanical waves | waves in water, sound, seismic waves (earthquake), thunder |
| waves caused by a disturbance n an electric/magnetic field | electromagnetic waves |
| the DO NOT NEED ( ) | matter |
| they DO NOT NEED a ( ) | medium |
| examples of electromagnetic waves | ligh, x-rays, ultra violet rays, radio waves |
| waves transfer ( ) from one place to another | energy |
| ( ) may spread out as a ( ) travels from one place to another | energy, wave |
| energy from ( ) can change from wave to other ( ) of energy | waves,types |
| a fresh start of a wave of energy at its source | wave front |
| wave ( ) from the same ( ) carry the same amount of ( ) | fronts, wave, energy |
| if you are close to the wave front, you may get hit with a lot of ( ) | energy |
| but as the wave front moves ( ) from its source, the energy spreads out over a ( ) area | outward,larger |
| if you are far from the ( ) of waves, you may not get hit with much ( ) | source, energy |
| a back and forth motion | vibrations |
| a ( ) needs time to occur | vibration |
| vibrations involve energy ( ) | transformations |
| as ( ) is applied to the string, it is pulled out of place | stress |
| it has elastic ( ) energy to try to go back to its original place | potential |
| ( ) is turned into kinetic energy as the string starts vibrating | potential |
| a complete set of repeated events | cycle |
| ( ) pass through objects by causing their particles to collide with particles beside them | waves |
| they all try to get back to their original ( ), and the ( ) moves along as they bump into other ( ) | position, energy, particles |
| a vibration that fades out as energy goes from one particle to the next | dampened harmonic motion |
| example: | sound fades over distance |
| particles move perpendicular to motion of energy | transverse waves |
| example: | people in a stadium do the wave and they just stand up then sit down, the wave goes around the stadium (hence transverse wave) |
| energy goes | accross |
| vibration goes | up and down |
| particles move parallel to motion of energy | longitudinal waves |
| example | strech out a slinky and then push quickly on one end. a compression of slinky coils travel down the length of the slinky in the same direction as the energy |
| paricles move in circles | surface waves |
| the highest point on a transverse wave | crest |
| the lowest point on a transverse wave | trough |
| the greatest distance particles move from their "at rest" position | amplitude |
| the distance between 2 equivalent parts of a wave | wave length |
| the amount of time it takes for a complete wave to pass by | period |
| how many cycles occur during a certain time | frequency |
| frequency= | frequency=1/period |
| hertz=cycles/seconds | see notes for examples |
| how fast a wave travels through something | wave speed |
| wavespeed | wavespeed=wave length/period or wave speed=frequency x wavelength |
| wave length | wavelength=wavespeed x period |
| wave speed depends on the ... | medium |
| a change in frequency of a wave when the source of wave is moving | doppler effect |
| since pitch (high or low) is determind by wave ( ) moving objects can crunch their ( ) together or string their waves out behind them | frequency,waves |
| sound waves in front of a moving object are ( ) together and sound ( ) pitched than sound waves in back of a moving object | closer,higher |
| when a wave bounces back as it meets a surface | reflection |
| when a wave bends as it passes an object or opening | diffraction |
| when a wave bends as it passes from one medium to another ( like from a gas to a liquid) | refraction |
| when a wave combines with another wave | interference |
| waves combine to make a wave with higher amplitude | constructive interference |
| waves combine to make a wave with smaller amplitude | desructive interference |
| when a wave combines with another wave and appears fuzzy but doesnt seem to move like a guitar string vibrating back and forth but it looks like a blur that is not moving |
Created by:
darrl
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