A 20.0-kg rock is dropped and hits the ground at a speed of 90.0 m/s. Calculate the rock's gravitational potential energy before it was dropped. (Ignore the effects of friction.)

Where does fusion occur?

What speed does an xray have in space?

An uncharged metal sphere hangs from a nylon thread. When a positively chargedglass rod is brought near it, the sphere is drawn toward the rod. But if the spheretouches the rod, it suddenly flies away from the rod.

A combination reaction is when two or more reactants __ to form one product

Blood pressure is measured when the blood is pumping (systolic) and when the heart is resting (diastolic). When pressure readings are given, the systolic is given first, and healthy blood pressure is around 120 over 80 mm Hg.

3. A stone is thrown upward at an angle. What happens to the horizontal component of its velocity as it rises

A sealed of gas at 101,000 Pa is expanded, reducing the volume from 0.5m3 to 0.25m3.

Explain one effect that burning fossil fuel has on the environment

What components of the atom are found outside of the nucleus? protons electrons neutrons all are found in the nucleus

What is the general relationship between the state of matter and density?