Q. Two devices with capacitances of 18 µF and 7.4 µF are each charged with separate 120 V power supplies. Calculate the total energy stored in the two capacitors.
Q. A pendulum clock that works perfectly on Earth is taken to the Moon. (a) Does it run fast or slow there? (b) If the clock is started at 12:00 midnight, what will it read after one Earth day (24.0 h)? Assume that the free-fall acceleration on the Moon is 1.63 m/s2.