2011年3月30日 星期三

Explaining a Process-2

If you want to know  which is a better collector among the white and the black cans, you can implement an experiment.  First of all, prepare 2 tin cans and paint the cans-one black, one white.  Secondly, fill the cans with water.  In addition, put the cans in direct sunlight for three hours.  As a final point, check the temperature of the water in the black can is higher.  To sum up,  after doing the experiment, you can know the black can absorb more sunlight.

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