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Physical Science: Why can a coin float in a glass of water?
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I know it has something to do with the surface tension. But I don't know how to explain it other than that.
"Water will not wet the aluminum coins. The surface of the water curves down toward the edge of each coin. The coins are thus supported by the surface tension of the water. (Aluminum is denser than water and will not float, if the coins are pushed under water they sink to the bottom.)"
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