Calculate the normal force on a 25 kg object being held against the wall (not on the floor) with a force of 27 N.

use this formula and you'll find the answer

F=ma

this is what I think

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

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

c) both a and b.

double the distance = divide strength by 4