CHAPTER 25 PHYSICS
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Vibrations | an oscillation or repeating back and fourth
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| wave | a disturbance that repeats regularly in space and time
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| period | the time required for a pendulum to make on to fro swing
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| simple harmonic motion | the back and fourth vibratory motion of a swinging pendulum.
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| sine curve | a curvve whose chape represents the crests a throughs of a wave
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| crest | one of the places in the a wave the the higher disturbance
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| trough | one of the places in a wave whre the wave is lowest
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| amplitude | the distance fromt he midpoint to the maximun crst of the wave
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| wavelength | the distance formt he top of the crest of a wave to the top of the collowing crest
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| frequency | the number of events cycles per time
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| hertz | the si unit of frequency
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| transcerse wave | the wave wiht vibration at right angles
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| 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
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| interference pattern | a pattern formed by the overlapping of two or more waves at the same time
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| constructive interference | addition of two or more waves when wave crats overlap to produce a resulting wave of invreased amplitude
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| destructive interference | a combanation of waves where crest of one wave overlap trouphs of anohter. resulting in a wave of decreased amplitude.
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| 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.
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| 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.
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| 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
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| node | any part of a stading wave that remains stationary
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| antinodes | the positions on a stading wabve where the largest amplitudes occur.
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| doppler effect | the apparent change in frequency of a wabe due to the motion of the source or of the receiver.
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| blue shift | an increase in the measured frequency of lightfrom an approaching source.
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| red shift | the decrease in the measured frequency of light from a receding source
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| bow wave | the v shapped wave produced by an object mobing on a liquid surface faster then the wave speed.
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| shock wave | the cone shapped wave produced by an object moving of super sonic speed
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| sonic boom | the sharped crack heard when the shock wave.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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