A pitot-static tube is used with a mercury (SGHg =13.6) manometer to measure the flow of an inviscid fluid with SGf = 1 in a 4in diameter pipe. What is the flow rate through the duct?

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Lubricants

Lubricant can be expressed as the substance that is applied among surfaces to control the wear and tear and improve performance. Lubricants play an essential part in the safety of machinery components like gears, shaft, linkage, cam, clutches, and many others. The quantities which affect the amount of lubricant are temperature, surrounding conditions, speed of the components, and many more.