In a longitudinal wave, wavelength can be measured as the distance between A. two adjacent compressions
B. a compression and the next resting place
C. both.
D. none of the above

A. two adjacent compressions

Explanation:

A wave is transverse if the oscillations occur at a right angle (transverse) to the direction of wave propagation. This kind of wave creates characteristic hills and down. Transverse waves include all-natural electromagnetic waves, rope waves, water waves, waves generated by the marketing of taut wire.

A wave is longitudinal if the oscillations occur along (along) the direction of wave propagation. The longitudinal wave creates characteristic places of thickening and thinning of the environment. Longitudinal waves include:

sound wave, elastic wave, laser beam

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.