A body is made up of multiple parts that are attached to each other by several compressed springs. It has been shot from a cannon and at the peak of its trajectory the springs are released, causing the parts to fly apart. The center of mass of the two parts
a. travels in a straight line at constant speed.
b. is now a meaningless concept.
c. follows a path which depends on the relative masses of the parts.
d. continues along the same parabolic path as before.

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.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.