Which of the following situations would cause the greatest increase in the motion of molecules in a system?   a. the system absorbs 75 j of heat, and its volume is halved.   b. the system releases 75 j of heat, and its volume doubles.   c. the system absorbs 75 j of heat, and its volume doubles.   d. the system releases 75 j of heat, and its volume is halved.

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_