Homework Help: physics

Posted by sand on Monday, December 12, 2011 at 8:55am.

A lead brick with volume of 7*10^-4m^3 is floating in bath of liquid mercury. What fraction of the lead brick’s volume is above the surface of mercury?
A student uses a stick to push the lead brick below the mercury surface so that it is completely submerged. What force is required to hold the lead brick below the mercury surface?

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