Complete:

wave motion is a kind of motion

Well I guess it could be gravity.

answer:

propagation of disturbances

Explanation:

wave motion, propagation of disturbances—that is deviations from a state of rest or equilibrium from place to place in a regular and organized way most familiar are surface waves on water but both sound and light travel as wavelike disturbances and the motion of all subatomic particles exhibits wavelike properties

( hope this helps )

a sonic boom is a loud boom that breaks the sound barrier

explanation:

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2