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I just got this wrong for the third time. A u-tube manometer is used to measure the pressure of a vessel under vacuum. Assume the manometer is open to atmospheric pressure (101.325 kPa) and the density of the fluid in the manometer is 12.0 g/cm3. When the vessel is under 12 psi of vacuum, the height of the fluid column is 75 cm. If the vessel partially loses vacuum and is now under 6.0 psi of vacuum, what will be the new height of fluid column (answer in cm).

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