The pressure at depth h below the surface of a liquid of density ρ open to the atmosphere is
A
Greater than the atmospheric pressure by ρgh
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B
Less than the atmospheric pressure by ρgh
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C
Equal to the atmospheric pressure
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D
Decreases exponentially with depth
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E
Increases exponentially with depth
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Solution
The correct option is A Greater than the atmospheric pressure by ρgh Pressure at depth h to the open surface p=p0+hρg. i.e., the pressure at depth h below the surface of a liquid of density ρ open to the atmosphere is greater than the atmosphere pressure by ρgh.