9 - When will a concentric crack NOT terminate when it meets an existing crack? A)
B)
C) Only when extreme pressure is applied to the window
D) Never

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

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) =_

Why does lightning travel from clouds to the ground?