A tennis ball is tossed straight up from the ground and allowed to fall back to the ground. Ignoring air resistance, explain how the vertical velocity changes throughout the tennis ball's flight.

If a balloon is taken outside on a very cold day, what will occur?

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) =_

Asimple electrochemical cell contains two electrodes? t or f