Solar water heater. A solar water heater for domestic hot-water supply uses solar collecting panels with a collection efficiency of 50% in a location where the average solar-energy input is 200 W/m2. If the water comes into the house at 15.0°C and is to be heated to 60.0°C, what volume of water can be heated per hour if the area of the collector is 30.0 m2?
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