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dvolpe
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Homework Statement
What is the approximate decrease in pressure in going 31 m above the surface of the lake? Air at 20 degrees C has density of 1.2 kg/mcubed. The pressure at the surface of the lake is 104 kPa
Homework Equations
Pressure = F/Area
Force = density*area*height*g
Pressure = density*height*g = pgh
The Attempt at a Solution
P = 1.2 * 9.8 * 31 m = 364.56 Pa
These doesn't seem right in comparison to the surface of lake. What about atmospheric pressure? Does that need to be considered here as there is a pressure decrease?