What two quantities must stay the same in order for an object to have a constant velocity? a) the speed and kinetic energy must be constant. b) the speed and mass of the object must be constant. c) the speed and direction of travel must be constant. d) the force applied to and direction of travel must be constant.

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?