What is gravitational potential energy?
A) energy resulting from the attraction between two changes
B) energy resulting from the repulsion between two masses
C) energy resulting from the repulsion between two charges
D) energy resulting from the attraction between two masses.

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?