Newton's cradle consists of an aligned row of identical elastic balls suspended by strings so they barely touch one another. when two balls are raised from one end and released, they strike the row and two balls pop out from the other end. if instead, one ball popped out with twice the speed of the two, this would violate

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) =_