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 shown. The surface of the oil is not shown.
Points A and D are at the same level; points B and C are at the same level.
b. Will the pressure at the top surface of the oil be greater than, less than, or equal to the pressure at point D (Hint: What is the pressure at point D?)
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