Why is atmospheric pressure equal to 76cm of mercury

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The magnitude of atmospheric pressure is equal to the pressure exerted by a :
(a)76 mm tall column of mercury
(b) 760 mm tall column of alcohol
(c) 76 cm tall column of mercury
(d)760 cm tall column of mercury

Q. Pressure exerted by

76 c m

high column of mercury is equal to ______ pressure.

Q. If the atmosphere pressure is

76 c m

of mercury, at what depth of water the pressure will becomes

4

atmospheres?

Q. A manometer reads the pressure of a gas in an enclosure as shown in the figure. The absolute and gauge pressure of the gas in cm of mercury is Mercury (Take atmospheric pressure = 76 cm of mercury)

Q. 76 cm of mercury column exerts a pressure equal to that exerted by:

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