f a ball is thrown into the air with a velocity of 55 ft/s, its height (in feet) after ������ seconds is given by ������=55������−16������2. find the velocity when ������=4.

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?