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 `65mm` from its original level (see diagram). The density of the oil is: A. `650 kg m^(-3)`B. `425 kg m^(-3)`C. `800 kg m^(-3)`D. `928 kg m^(-3)`

A U-tube with both ends open to the atmosphere is partially filled wit

1.	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 `65mm` from its original level (see diagram). The density of the oil is: A. `650 kg m^(-3)`B. `425 kg m^(-3)`C. `800 kg m^(-3)`D. `928 kg m^(-3)`
Answer» Correct Answer - D Pressure at `B =` presure at `C` `(65 + 65 + 10) rho_(oil) g = (65 + 65) rho_(w) g` or `140 rho_(oil) = 130 xx rho_(w)` or `rho_(oil) = (13)/(14) rho_(w) = (13)/(14) xx 10^(3) kg//m^(3)` `=928 kg//m^(3)`

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