Timmy placed a horseshoe magnet on his desk. He then sprinkled some iron filings around the magnet.

In the images below, the poles of the horseshoe magnet are shown in white. A horseshoe magnet has both a north pole and a south pole. Which of the following images best shows how the iron filings arranged themselves?

Modify the equation fδt=δ (mv) to find the force of friction.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?