A region of space that contains no matter

A block of mass 20 kg sits on a ramp with an angle of 31 degrees above the horizontal. Assuming no friction, how fast will the block accelerate down the ramp? 7.89 m/s^2 5.34 m/s^2 2.98 m/s^2 4.17 m/s^2

Which of the following best explains why mutations cannot cause evolution?

When humans started launching rockets into outer space, they needed to make certain the rockets had enough power to escape Earth's gravitational field.

The water table is the a. lower boundary of the zone of saturation. b. aquifer. c. zone of aeration. d. upper boundary of the zone of saturation.

Physicists talk about many forms of energy. One of the most common forms is force itself. 1. False 2. True 3. None of these 4. This may happen in many cases, but not in every case. 5. This may happen in a few cases, but it is very rare.

How fast or slow an object is moving and in what direction

Which paragraph shows the correct relationship between kinetic energy and speed?

At which position does the diver have the most gravitational potential energy

The visible light spectrum ranges between A. radar waves and X-rays. B. ultraviolet rays and gamma rays. C. infrared rays and ultraviolet rays. D. television waves and infrared rays.

Sarah added sugar to her iced tea, but it is not dissolving very quickly. Which can Sarah do to make the sugar dissolve faster? Add more sugar. Heat the tea. Add more ice.