Which best describes a difference between energy transformations in power plants and dams?

a - only power plants use fossil fuels to transform energy.

b - only dams use fission to generate thermal energy.

c - only power plants use water to turn turbines.

d - only dams use mechanical energy to produce electricity.

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Need only answer if you think you know it