A 2.3 kg ball strikes a wall with a velocity of 6.3 m/s to the left. The ball bounces off with a velocity of 4.3 m/s to the right. If the ball is in contact with the wall for 0.38 s, what is the constant force exerted on the ball by the wall? Answer in units of N.

The mini-refrigerator fire was most likely caused by what type of wiring?

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 should the wavelength scale of spectroscope be calibrated