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which best describes the energy of a sound wave as it travels through a medium? it increases.
it decreases.
it remains the same.
it depends on the medium.

It depends on the medium

Explanation:

Sound energy depends on the medium through which it is propagated

Since a medium is involved it reduces the energy

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

the answer is b, have negligible mass