The sun is the source of
a. all energy for your body
b. ultraviolet radiation that can cause cancer
c. oxygen, which supports our breathing
d. none of the above

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9