Sound waves travel through a medium by: a. Being absorbed
b. Vibrating the particles within the medium
c. Perpendicular to the energy of the wave
d. Causing the particles to compress and move apart

answer is b

Explanation:

this is because the object vibrates hence causing movement in the particles of the medium. It keeps going until the particles run out of energy. Hope that can help

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.

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

explanation: