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Grade: 9
A tank contains a pool of mercury 0.30m deep,covered with a layer of water that is 1.2m deep. The density of water and Mercury are 1 and 13.6 in g/cm^3. Find the pressure exerted by the two layers at the bottom of the tank.
2 years ago

Answers : (1)

24740 Points
Dear Satvik
First find the pressure at the top of the mercury pool.
For a point below the surface of the mercury this may be regarded as a source of external pressure Pext
P(water) = 1000 * 9.8 * 1.2 = 12 kPa.
Pressure p(int) exerted by the Mercury column itself is found in the same manner.
P int = 13.6 * 1000 *9.8* 0.3
= 40 kPa
Hence total pressure at the bottom is 52 kPa
Arun (askIITians forum expert)
2 years ago
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