If earth were twice as far from the sun, the force of gravity attracting the earth to the sun would be
a. twice as strong
b. half as strong
c. one-quarter as strong.
can someone explain this one for me ? : )

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

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

If anyone who can me with this hw? i would really appreciate it