8. Olympics medals have a diameter of 60mm and a thickness of 3mm. Gold has a density of 19g/cm. Work out a) the volume of a gold medal
b) the mass of a gold medal.
Hint - think of the gold medal as a cylinder

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) =_