How do you measure the wavelength of a longitudinal wave?

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the distance from a rarefaction to a compression
the length of a rarefaction
the length of a compression
the length of one full compression and one full rarefaction
3. Why do sound waves travel faster through warm air?
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The molcules in warm air move slower.
The molecules in cold air move faster.
The molecules in warm air move faster.
4. How does the amplitude of a wave affect sound?
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the higher the amplitude, the louder the sound
the lower the amplitude, the louder the sound
the higher the amplitude, the higher the pitch
the lower the amplitude, the higher the pitch
5. What happens to the wavelength of a wave when energy increases?
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Wavelength becomes longer.
Wavelength becomes shorter.
Wavelength is not impacted by the amount of energy.

The length of one full compression and one full rarefaction.