Buoyant forces...Physics...please help!!
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Buoyant forces...Physics...please help!!

[From: ] [author: ] [Date: 11-05-07] [Hit: ]
529 kg/L. ??-The rock displaces 36 L of mercury at a density of 13.36*13.6 = 489.......
A rock weighing 8654 N rock with a volume of 36 L is completely submerged in mercury. The density of mercury is 13.6 kg/L.

How do I calculate the buoyant force of a rock if the density is 24.529 kg/L. ??

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The rock displaces 36 L of mercury at a density of 13.6 kg/L

36*13.6 = 489.6 kg of mercury displaced

489.6 x 9.8 = 4798 N of upward force on the rock from the buoyant forces of the liquid mercury.

Net force on the rock is 8654-4798 = 3856 N downward.
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