The orbital radius of Earth's Moon is 3.9Å~108 m. Use Newton’s version of
Kepler’s third law to calculate the
period of Earth’s Moon if the orbital
radius were doubled.
79 days

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?