The angular momentum of the propellers of a small airplane points directly forward from the plane. (a) in what direction do the propellers rotate as seen from the rear of the plane? (b) if the plane is flying horizontally and suddenly pulls upward, in which direction does the nose of the plane tend to move? justify your answer.

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) =_