A ball is thrown vertically upward with a speed v. an identical second ball is thrown upward with a speed 2v. how many times higher does the second ball go than the first one?

Which of the following is related to intensity of light in a photoelectric effect? A) Intensity of light is related to work function of the metal. B) Intensity of light is related to frequency of the light.

A scientist is studying a shock wave from an earthquake. What kind of wave is being studied? an electromagnetic wave a gamma ray a radio wave a mechanical wave

What types of substances tend to be acidic

You are an astronaut in space far away from any gravitational field, and you throw a rock as hard as you can.

The chemical formula for cesium oxide is Cs2O. What is the charge of cesium? + 1 + 2 - 1 - 2

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?

3/129 A 175-lb pole vaulter carrying a uniform 16-ft, 10-lb pole approaches the jump with a velocity v and manages to barely clear the bar set at a height of 18 ft. As he clears the bar, his velocity and that of the pole are essentially zero.