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Physics ch 25
CHAPTER 25 PHYSICS
| Question | Answer |
|---|---|
| Vibrations | an oscillation or repeating back and fourth |
| wave | a disturbance that repeats regularly in space and time |
| period | the time required for a pendulum to make on to fro swing |
| simple harmonic motion | the back and fourth vibratory motion of a swinging pendulum. |
| sine curve | a curvve whose chape represents the crests a throughs of a wave |
| crest | one of the places in the a wave the the higher disturbance |
| trough | one of the places in a wave whre the wave is lowest |
| amplitude | the distance fromt he midpoint to the maximun crst of the wave |
| wavelength | the distance formt he top of the crest of a wave to the top of the collowing crest |
| frequency | the number of events cycles per time |
| hertz | the si unit of frequency |
| transcerse wave | the wave wiht vibration at right angles |
| longitudinal waves | a wave in which the vibration is in the same direction as that in which the wave is teveling rather then at right angles to ti |
| interference pattern | a pattern formed by the overlapping of two or more waves at the same time |
| constructive interference | addition of two or more waves when wave crats overlap to produce a resulting wave of invreased amplitude |
| destructive interference | a combanation of waves where crest of one wave overlap trouphs of anohter. resulting in a wave of decreased amplitude. |
| out of phase | term applied to two waves for which the crest of one wave arrives at a point at the smae time that a trough of the second wave arrives. their effects cancel each other. |
| in phase | tern applied to two or more waves whose crests and troughs arrive at a place at he same time, so that thrie effects reinforce each other. |
| standing wave | wave in which parts of the wave remain stationary and the wave appears not to be teaveling the resulf of interence between wave |
| node | any part of a stading wave that remains stationary |
| antinodes | the positions on a stading wabve where the largest amplitudes occur. |
| doppler effect | the apparent change in frequency of a wabe due to the motion of the source or of the receiver. |
| blue shift | an increase in the measured frequency of lightfrom an approaching source. |
| red shift | the decrease in the measured frequency of light from a receding source |
| bow wave | the v shapped wave produced by an object mobing on a liquid surface faster then the wave speed. |
| shock wave | the cone shapped wave produced by an object moving of super sonic speed |
| sonic boom | the sharped crack heard when the shock wave. |
Created by:
Wardlaw
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