When was the first ozone hole discovered

A book is sitting on a table, completely still. What would happen if gravity suddenly stopped affecting the book? A. The book would move upward. B. The book would stay where it is. C. The book would fall. D. The book would move sideways.

which of the following is an example of a compound machine. a. a bicycle chain. b. a coffee mug. c. a paper cutter

If the velocity of a moving object doubles, then what else doubles?

Hich of the following needs is an addition to Maslow's original hierarchy and only appears in the eight-stage revised model

Energy enables an object to do work. Work is done when A) no force is put on an object, and the object does not move in any direction. B) a force is put on an object, but the object does not move in any direction.

Which statement is correct about gasoline when it is burned? Heat energy is created by the gasoline. The total energy of the gasoline decreases. Chemical energy in the gasoline is destroyed. Chemical energy is transformed into heat energy.

The tilt of the Earth's axis of rotation changes over a period of 41,000 years. Which of these statements best predicts a long term effect of the changes in the tilt of the Earth's axis of rotation? a. The Earth's climate would change. b.

What do keratinized cells form?

Explain why Planck's introduction of quantization accounted for the properties of black-body radiation.

How and which waves travel either through a medium or a vacuum?