the sears tower in chicago is 443 m tall. joe wants to set the worlds stair climbing record and runs all the way to the roof of the tower. if joes average upward speed is 0.06 m/s, how long will it take joe to climb from street level to the roof of the sears tower? convert your answer into hours

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?