Mechanical Properties of Fluids
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What is a barometer?

Barometer is a device used to measure the atmospheric pressure. Barometer keeps a track of the change in the atmospheric pressure. 
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    If we exhaust the air from a sealed tin can, what will happen to it?
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    State Archimedes’s principle.
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    An air bubble is released from the bottom of tank. What happens to the size of air bubble as it rises upward in the tank?
    Answer
    Barometer tube of mercury barometer is one meter long. Would you require a longer or a shorter tube if the mercury were replaced by water in the tube?
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