Galileo used his telescope to discover evidence for the Sun-centered model of the solar system. This evidence included all of the following except .a. Venus going through phasesb. Venus revolving around the Sun, not Earthc. the planets moving in ovals or elipsesd. moons revolving around Jupiter

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 3.00 ms . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?