Agas is placed inside a very cold box. the gas molecules transfer heat to the walls of the box. which best describes what happens to the gas as it cools down? the gas molecules slow down, and some change phase to liquid. the gas molecules speed up due to collisions with the walls. the gas molecules vibrate around fixed positions. the gas molecules gain energy from the cold walls of the box.

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) =_