how does the mercury and aneroid barometer work ?
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aneroid barometer work =Inside an aneroid barometer is a small capsule. This capsule has had the air pumped out of it. When the air pressure rises, the sides of the capsule are compressed. The capsule is attached to levers which move a needle as the air pressure squeezes the capsule.
mercury barometer work=The barometer works by balancing the weight of mercury in the glass tube against the atmospheric pressure, much like a set of scales. ... If the weight of mercury is more than the atmospheric pressure, the mercury level falls (low pressure)
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