A 2 meter long glass tube, closed at one end, is lowered vertically to the bottom of a freshwater lake with the free mouth down. Later it recovers and a mark shows that the water rose up to 55 centimeters from the closed end. So if the temperature is constant, the pressure at the bottom of the lake is _______ atmospheres a. 27.5 b. 3.34 c. 2.34 d.0.12
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