Question

Which of the following statements is true?

Magnetic fields can push and pull protons.
Magnetic fields are weakest at the poles of a magnet.
A change in acceleration is called velocity.
Energy input is always greater than energy output.

Answer 1

Answer:

d

Explanation:

energy input is always greater than energy output..some energy is lost

Answer 2

Explanation:

engery input is always greater than the energy output because nothing is cent percent efficient