The question is in the screenshot

4m the frequency was cut in half so the wave length will double

Explanation: V=f x λ• If wave speed is held constant and frequency is doubled, what happens to wavelength? – wavelength is halved• If increasing one variable causes another variable to decrease by the inverse of the same magnitude, that relationship is called a inversely proportional relationship.

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

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

c) both a and b.