Discuss how solar energy would increase the temperature of a mass of water in a perfectly absorbing tank that is exposed to the sun for an entire day. Consider an example of 1000 liters of water at an initial temperature of 15o C in a cubical tank with an average surface exposure of 2 m2. Assume that no dissipation of heat is caused by the tank.
1000 liter is composed of 1,000,000 cubic centimeters (cc) . One
cc, which is also the same as a milliliter (mL) of water weighs one
gram. Therefore, 1000 liter of water weighs 1000 kilogram. So you
got 1000 kilogram of water. (It is also important to note that the
density of water changes with temperature, but we will neglect
those small changes to greatly simplify the calculation)
Firstly, the more water you have, the more energy it takes. The colder the water, the more energy it takes.
The first assumption is that the water is at room temperature, or 15
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