Which of the following technologies works by emitting high-energy electromagnetic radiation to destroy cells?

A. Airport scanner

B. Nigh-vision device

C. light sensor

D. Gamma Knife

Jack and Jill have a pail of water. Which action will cause the molecules of water to move faster?

From what expression was the word radar derived

Think critically: the different molecules that make up the air in a room have, on average, the same kinetic energy. how does the speed of the different air molecules depend on their masses? your answer

Planets that are cold have only a small amount of gravity

Based on the law of conservation of energy, which statement is false? O A. Energy is lost when machines don't work right. B. We can't add more energy to the universe, OC. We can't destroy energy that exists in the universe. OD.

Two workers pull horizontally on a heavy box but one pulls twice as hard as the other. The larger pull is directed at 25.0 west of north and the resultant of these pulls is 430.0N directly northward.

What would happen to an object in orbit without gravity pulling down?

The waters of a lake will be most layered in which season A. winter B. spring C. summer D. fall

Which of the following is an example of an archery contestant showing good precision but poor accuracy? O A. Hitting a bulls-eye once and then missing a second time O B. Hitting a bulls-eye every time O C.

List and describe two ways currents affect life on earth