John and Barry are pulling on a fence post with ropes while their friend Pat uses a chain-saw to shear it at ground level. John applies a force of 75.0 N [40 degrees] on one rope while Barry applies a fore of 85.0 N [340 degrees] on the other rope. What is the net force on the post?

Which describe reflection? check all that apply. light bounces off a boundary.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

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) =_