A U tube with both ends open to the atmosphere is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile, the water rises by 65 mm from its original level (see diagram). The density of the oil is____ ρ w = 1000 kg m - 3

Question

A U tube with both ends open to the atmosphere is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile, the water rises by 65 mm from its original level (see diagram). The density of the oil is____ ρ w = 1000 kg m - 3, 650 kg m - 3, 425 kg m - 3, 800 kg m - 3, 928 kg m - 3

MARKS App · Accepted Answer

∵ Pressure in a stationary liquid at the same level is the same everywhere. As both ends of the tube are open, the pressure on both free surfaces should be equal. h o i l ρ o i l g = h w a t e r ρ w a t e r g 140 × ρ o i l = 130 × ρ w a t e r ρ o i l = 928 kg m - 3 .

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