2011年3月30日 星期三

Explaining a Process (2)

You can find it sure that black is a better collector of solar energy than white by doing a experiment. What you need is two tin cans, black and white paint and room thermometer. First, paint the cans-one black, one white. Next, fill the cans with water. When there is water in the cans, put the cans in direct sunlight for three hours. The last thing you should do is check the temperature of the water in the cans and compare. Wait for a while, you will see that the temperature of the water in the black can is higher.

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