A pipeline conveys benzene from one point to the other. A gauge attached to line reads 150 kPa. It is desired to check the gauge reading with benzene –over-mercury U-tube manometer. Determine the expected height difference of the mercury in the manometer; if on one end the manometer is open to the atmosphere and on the other end where the gauge pressure is connected there is a 3 cm height of benzene above the mercury meniscus. (benzene density is 876 kg/m3 and mercury 13600 kg/m3

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Q: calculate the gauge pressure at the bottom

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