A 20kg ball is rolling at a speed of km/s. how much is the kinetic energy?

A 25 kg girl steps off a diving platform that is 2 m high. Neglecting the effects of friction, what is the girl's speed just before she hits the water? A. 2.0 m/s B. 6.3 m/s C. 39 m/s D. 490 m/s

Which of the following gives the best description of the motion of electrons in a conductor? A. The electrons in conductors usually move in straight lines. B. The electrons in conductors are able to move about freely. C.

What muscle brings the shoulders and arm backwards

A scientist collected data in 10 trials comparing tired students' and awake students' test scores. Trial Tired Average Score 1 34% 2 56% 3 60% 58% Awake Average Score 67% 88% 90% 86% Which trial was the least precise and is unlikely to be

What is the role of electrical forces in nuclear fission

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why: