1.A trough of amplitude 4 m meets an opposing trough of amplitude 7m. What is the amplitude of the point where interference occurs?

the answer is b

explanation:

i think if it were me i whould divide 300 dide 15

step-by-step explanation:

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

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

c) both a and b.