The earth is made mostly of metals and rocks. where did this material come from? it was made by nuclear fission of uranium and other radioactive materials. it was produced in the big bang. it was created by chemical reactions in interstellar space. it was made by our sun. it was produced by nuclear fusion in stars.

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 amount of potential energy possessed by an elevated object is equal to what?

What type of graph used to show how a part of something relates to the whole