Question

choose the correct answer from the drop - down selection for each definition below
strength or intensity of an ultrasound wave
the length of a single cycle of a wave, which is the distance one peak or trough of a wave and the next
the speed at which something travels
--select--
wavelength
amplitude
velocity
--select--

Explanation:

First Definition (Strength or intensity of an ultrasound wave)

Amplitude is defined as the strength or intensity of a wave (including ultrasound waves). Wavelength is the length of a wave cycle, and velocity is speed of travel, so neither matches this definition.

Wavelength is the distance between successive peaks or troughs (one cycle) of a wave. Amplitude is about strength, velocity about speed, so Wavelength fits.

Velocity is the speed (with direction, but in basic terms for wave speed, it's the rate of travel). Amplitude is strength, wavelength is cycle length, so Velocity matches.

Answer:

Amplitude

Second Definition (The length of a single cycle of a wave, which is the distance one peak or trough of a wave and the next)