Question

explain the working of a barometer

Answer 1

Photo: A Torricellian barometer(sometimes called a mercurybarometer) is an inverted (upside-down) glass tube standing in a bath of mercury. Air pressure pushes down on the surface of the mercury, making some rise up the tube. The greater the air pressure, the higher the mercury rises

Answer 2

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$\implies$A Barometer is a device used to measure atmospheric pressure. It consists of a glass tube which is long and sealed at one end. First it is filled with Mercury and then inverted gently into a trough containing Mercury. The level of mercury in the tube Falls and a vacuum created at sea level. The atmospheric pressure pushes the mercury in the trough which in turn increases the level of mercury in the tube until the height of mercury in the tube balances the pressure of the atmosphere.

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