To totally convert a given amount of mechanical energy into heat is

Choose one answer. a. impossible.
b. possible.
c. impossible to answer without additional information.

Possible

To determine if it is possible to convert a given amount of mechanical energy into heat, we need to consider the laws of thermodynamics. The first law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted from one form to another.

In the case of converting mechanical energy into heat, it is certainly possible. Mechanical energy can be converted into heat through various processes, such as friction or resistance. For example, when a moving object experiences friction or air resistance, the mechanical energy is transformed into heat energy.

Therefore, the correct answer is b. possible.