Pressure in fluids:
1 Pa = 1 N/m2
Pw = hwρwg = 0.8 × 1000 × 9.8 = 7840 N/m2
An oil layer floats on 80 cm of water in a tank. The pressure at the bottom of the tank is 111.0 kPa.
How thick is the oil? Suppose that the density of oil is 900 kg/m3.
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