What is the bottom fin of a fish called?

How would a small bar magnet be oriented when placed at position x?

Which branches of natural science include the study of an organism that lived 10 million years ago

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) =_