Which of the following is a force or motion that is involved in the Moon orbiting Earth?
A. a force pulling the Moon toward the
center
B. a speed at right angles to the line from
the mass of the Moon to the center of
Earth
C. acceleration toward the center of Earth
D. all of the above

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?