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# Bolvin - Chapter 25

### waves review

What is the time it takes to make one complete back and forth vibration called? period
What is the only thing the period of a pendulum depends on? length
What is the back and forth motion of a swinging pendulum called? simple harmonic motion
The highest point in a wave is called a ____. crest
The lowest point in a wave is called a ____. trough
The distance from the midpoint of a wave to its crest or trough is called the ____. amplitude
What is distance between the top of one wave crest to the top of the next wave crest called? wavelength
A ___ is the unit of frequency. hertz
How often a vibration occurs is called its ____> frequency
What is the relationship between the period of a wave and the frequency of the wave? indirectly proportional
What is it that you calculate by multiplying the frequency of a wave by the wavelength of the wave? wave speed
Which type of wave has the motion of the medium moving at right angles to the direction the wave travels? transverse
Which type of wave has the motion of the medium moving in the same direction as the wave travels? longitudinal
Sound is an example of this type of wave. Which type is it? longitudinal
______ is when 2 or more vibrations overlap each other. Interference
What is the name given to two waves that have their crests and their troughs overlapping each other? constructive interference
What is the name given to two waves in which the crests of one overlaps the troughs of the other? destructive interference
The ______ is the apparent change in frequency due to the motion of the source or the motion of the receiver. Doppler effect
As the frequency of a sound is increased, does the wavelength increase, decrease or stay the same? decrease
Created by: abolvin