A U-tube is partly filled with water. Oil is then poured on top of the water on

Question

A U-tube is partly filled with water. Oil is then poured on top of the water on one side. The final water levels on both sides are as shown. The surface of the oil is not shown. Point A and D are the same level; points B and C are at the same level. Is the pressure at point B greater than, less than, or equal to the pressure at point C? Explain. Will the pressure at the top surface of the oil be greater than, less than, or equal to the pressure at point D? Based on your answers to parts a and b, will the top surface of the oil be above, below or at the same height as the top surface of the water? Explain how your answer is consistent with P= P_0 +rhogh.

Explanation / Answer

a)it will be equal at both the points

b)it will be same, Pressure at point D is P0(i.e. atmospheric pressure)

c) Surface of oil will be above than that of water level assuming density of oil to be less than water's density.

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