Friday
September 19, 2014

Homework Help: Physics

Posted by Anonymous on Thursday, May 10, 2007 at 6:42pm.

If you lay a steel needle horizontally on water, it will float. If you place the needle vertically into the water, it will sink. Explain why.

It is because of surface tension. The hydrogen molecules bond with the steel of the needle. Look up surface tension in wikipedia or something to help you better understand.

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