When sound waves travel through a medium, the particles of the medium move parallel to the wave motion. which typeof wave displays this behavior?
a. longitudinal waves
b. transverse waves
c. perpendicular waves
d. electromagnetic waves

A. Longitudinal waves

Explanation: The displacement of the medium parallel to the propagation of the wave is a characteristic of longitudinal waves. Longitudinal waves are also characterized by compression and rarefraction.

A wave propagated along the length of a stretched Slinky toy, the increase and decrease of the coil gives a good example of longitudinal wave.

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.