The power supply to a typical black and white television set is 85 W. When the set is connected to 120v. a.) How much electric energy does this set consume in 1 hr? b.) A color television set draws about 2.5 Amperes while connected to 135V. How much time is required for it to consume the same energy as the black and white model in 3 hrs?

Part A Estimate the rms electric field in the sunlight that hits Mars, knowing that the Earth receives about 1350 W/m? and that Mars is 1.52 times farther from the Sun (on average) than is the Earth. ? Erms = V/m

Solar cells generate a potential difference when exposed to sunlight. In an experiment, you wish to charge a rechargeable battery by connecting it in series to an array of solar cells. You perform the experiment outdoors, in direct sunlight, when the intensity of solar radiation is 1000 W/m². However, your solar cells only have an efficiency of 11% (that is, only 11% of the sunlight power transmitted to the solar cells is delivered to the rechargeable battery). While the circuit is connected, you measure at one instant the potential difference across the battery to be 5.30 V and the current in the circuit to be 0.27 A. What is the area of the array of solar cells? m2

A box fan is left on as white noise at night and uses 0.58 A when plugged into a 12V line.  If electric power costs 12 cents per kilowatt hour, what is the cost of running the heater for 240 hours?