2011年3月30日 星期三

Explaining a Process - 2

  According to the research, black is a better collector of solar energy than white.  There is a simple experiment that we can prove it. Before begining the experiment, you need to prepare two tin cans, black and white paint, and a room thermometer.  First, paint the cans-one black, one white. Then, we can fill them with water. Next, we put the cans in direct sunlight for three hours. As a final point, check the temperture of the water in the cans and compare.  Therefore, we can find that the temperture of  the water in the black can is higher than that in the white one. 

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