What do the skull and vertebrae have in common

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) =_

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?