if an object moves in a circle at a constant speed, its velocity vector will be constant true or false

What is the exact meaning of net force?

How long would the night be on June 21 in Fairbanks, Alaska?

A 49 Newton rock is lifted 2 meters in 5 seconds. How much work is done? What power is used?

A light-year is: a. the distance light travels in one year b. about 19 trillion miles c. based on the distance from the earth to the sun d. all of the above

What are changes between forms of energy called? A. transformations B. conservations C. engines D. x-rays

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?