If you were measuring a lower-pitched sound wave, you would measure a. more compressions per second b. fewer compressions per second c. a greater amount of compression of the air d. a smaller amount of compression of the air

B

To measure a lower-pitched sound wave, you would measure fewer compressions per second. Pitch relates to frequency by measuring how many times a second the particles vibrate. Therefore, the lower-pitched sounds, the fewer compression waves or sound waves are produce because low-frequency sounds have greater distance between each wave.

Moreover, the frequency of a wave is measured as the number of complete back-and-forth vibrations of a particle of the medium per unit of time. The universal unit for frequency used is the Hertz (abbreviated Hz), where 1 Hertz = 1 vibration/second.

it is called kinetic energy

truck y has a greater velocity than truck x.