2011年3月30日 星期三

Explaining a Process-2

There is a simple experience we can do to prove that black is a better collector of solar energy than white. Before the experience, we should prepare two tin cans, black and white paint and a room thermometer. After finishing preparing these things, we can begin our plan. First, Paint one can black and another white. Second, fill the can with water. Third, put the cans in direct sunlight for three hours. Finally, check the temperature of the water in the cans and compare. After doing the steps, we can find that the temperature of the water in the black can is higher.

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