How fast would a 0.25 kg football have to be traveling to have the same momentum as a 0.05 kg bullet traveling 500 m/s?

Work is a transfer of a. energy. b. force. c. mass. d. motion.

A hunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20g bullets at 965m/s. the mass of the hunter (including his gun) is 72.5kg, and the hunter holds tight to the gun after firing it.

Which of the following describes the effect of a convex mirror on light rays? A. It reflects light rays inward. B. It reflects light rays outward. C. It has no effect on light rays. D. It has the same effect on light rays as a concave mirror.

I Think is B Endothermic: Measure of disorder as objects move toward equilibrium. Example: your bedroom becomes more messy each day. Question 1 options: A. True B. False: answer is Entropy C. False: answer is exothermic

500 J of work are done in 4 seconds to lift a 40 kg box to the top of a high shelf. How much power was required to complete the lift?

Which of the following are NOT two of the best ways to StaySafe around electricity?

If electrons of energy 12.8 ev are incident on a gas of hydrogen atoms in their ground state, what are the energies of the photons that are emitted by the excited gas?

Which of the follow choices defines energy in scientific terms 1). The ability to do work. 2). The motion of an object. 3). A force used on an object. 4). a change in temperature.

A pebble is thrown into a calm lake, ripples are formed from the center and move outward. The water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels

You are given a long length of string and an oscillator that can shake one end of the string at any desired