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Under same depth, atmospheric pressure is water pressure.

1. less than
2. greater than
3. equal to
4. none of these

Correct answer: less than

Solution

Pressure in a fluid at depth is given by \(P = P_0 + \rho gh\). Since water has a much larger density than air, the pressure increase with the same depth is much greater in water. Therefore atmospheric pressure is less than water pressure at the same depth.

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