physics questions for test coming up?

Newton discovered : A) gravity, B) that gravity is universal, C) neither

According to Newton, doubling the distance between two interacting objects : A ) divides by 2 the gravitational force between them. B) multiplies by 2 the gravitational force between them. C) divides by 4 the gravitational force between them. D) multiplies by 4 the gravitational force

What is the force of gravity of a 500 newton woman standing on the earth's surface? A) 50N B) 250 C) 500N D) 5000 N E) none of these.

A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, its verital component of velocity : A) increases, B) remains unchanged, C) decreases

A stone is thrown horizontally from the top of a cliff. One second after it has left your hand its vertical distance below the top of the cliff is. A) 5m, B) 10 m C) 15m

Inside a freely-falling elevator, there would be no : A) gravitational force on you B) apparent weight for you C) both of these D) none of these

How many different elements are in a water molecule? A) one B) two C) three D) four E) none

An atomic mass unit is 1/12 the mass of A) an electron B) a proton C) a hydrogen atom D) a carbon atom E) a uranium atom