Question

define the following
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1. rarefaction

2. compression

3. wavelength

4.wave frequency

_______________

Answer 1

1) reduction in the density of something, especially air or a gas.

2)the action of compressing or being compressed.
or
the reduction in volume (causing an increase in pressure) of the fuel mixture in an internal combustion engine before ignition.

3)the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
"a range of wavelengths"

4)Frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion. ... See also angular velocity; simple harmonic motion.

Answer 2

Hello! Here is your answer!!

1. reduction in the density of something, especially air or a gas.

2. the reduction in volume (causing an increase in pressure) of the fuel mixture in an internal combustion engine before ignition.

3. the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

4. the number of waves that pass a fixed point in a given amount of time.

Hope it helps..