With the ability to measure the motion of land masses, continental drift has become an established fact. the north american and european continents are drifting apart at a rate of about 3 cm/y. at this rate how long will it take them to drift 450 km further apart than at present?

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) =_