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# physics

### study guide CH.25

What is the symbol for frequency? f
a wiggle in time vibration
What determines the the Period of a pendulum? the length
The high points on a wave crest
the low points on a wave trough
what is the number of vibratioins in a given time (usually one secound)? frequency
what is the source of all waves? something that vibrates
What air the water air and string through which wave energy travels? they are the medium
when crest overlaps crest and causes an increase in amplitude what is it called? constructivr interference
when crest of one wave overlaps the trough of another and causes cancellation what is it called? destructive interference
True or false: you can only hear a sonic boom when it breaks the sound barrier. False
what is it called when a plane goes faster than the speed of sound? supersonic
what coccurs when a wave source moves faster than the waves it produces? bow wave
what happens when the source moves faster and faster in water? the narrower the V-shape gets
if a fire truck is moving towards you, with its horn on, what happens tto the frequency? the frequency gets higher
Created by: 14_hbentrup

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