Assume that you need to choose a resistor to serve as a water heater for your 1.6-inch diameter, 1.5-inch deep fishtank. If a 12VDC power supply is used and a heating rate of 2oC per minute is required, then what size of resistor should you choose? Assume that the density of water is 1000 kg/m3.

answer should be 20.9O


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