### U-tube with constant cross section is partly filled water

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##### Reference no: EM1344884

Q. A u-tube with constant cross section is partly filled with water. Engine oil of density 0.8g/cm3 is poured into the right arm (without mixing) until the water level rises 2.0cm. The length of the oil column is then:

A. 2.25 cm
B. need to know the cross-sectional area of the U-tube
C. 5cm
D. 6cm
E. 8cm

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