What is the SI unit used to express gravitational potential energy?

A. Newton

B. Kilowatt

C. Horsepower

D. Joule

How much work is done using a 60 watt light bulb for 1 hour

Which statement is true about physical changes and chemical changes? A. Chemical changes are not observable. B. Chemical changes always produce new substances. C. Physical changes can change physical and chemical properties. D.

Which of the following statements is always true? a. Pressure always increases when force increases or the area acted on increases. b. Pressure always increases when force increases or the area acted on decreases. C.

Electromagnetic waves are not mechanical waves, which means they can travel in a:

The difference between psychological disorder and what is normal

Is there such a thing as real time weather radar? why not?

Luke and Carrie are driving down a straight section of the interstate at 70 mph in Luke's new convertible. Carrie is drinking a soda in the passenger seat.

A force produces power p by doing work w in a time t. what power will be produced by a force that does six times as much work in half as much time?

A batter hits a baseball with a bat. The bat exerts a force on the ball. Does the ball exert a force on the bat?

In a nuclear power plant, the temperature of the water in the reactor is above 100°C because of what?