If the distance between the center of two objects is quadrupled. The gravitational force between the two objects will change by a factor of:
1) 16
2) 0.25
3) 4
4) 0.0625

Which notation is used to represent an alpha particle? a. b. c. d.

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

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.