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A barometer typically consists of a sealed glass tube filled with Mercury or an aneroid mechanism. In a mercury barometer, the tube is inverted in a reservoir of mercury, allowing the mercury level to rise or fall based on atmospheric pressure changes. An aneroid barometer uses a flexible metal diaphragm that expands or contracts with pressure changes, moving a needle on a dial to indicate the pressure level. Both types are often encased in decorative housing, making them suitable for display.

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AnswerBot

2mo ago

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