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August 5, 2015

Homework Help: Physics

Posted by Ceres on Wednesday, September 23, 2009 at 4:07pm.

The question is:
"A block of ice at 0oC is dropped from a height that causes it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the ice. Show that the height necessary for this to occur is at least 34 km."

I know that it takes 334J/g to turn ice to liquid (thanks to help that was given to me for another problem). Does this have anything to do with this problem? no mass is given for the ice, so I assume that there is no difference for one gram than there is for many gms of ice. What does the height have to do with the ice turning to water? The higher up it drops from the more force it has? Thanks.

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