A barometer is a tool to measure atmospheric pressure using a mercury-filled tube. It aids in weather forecasting and can also serve as an altimeter.
A barometer is the measuring tool described in the question. It consists of a tube filled with mercury, and as atmospheric pressure changes, the mercury rises or falls in the tube providing important information for weather forecasting.
Mercury barometers are widely used to measure atmospheric pressure, and the height of the mercury column is directly related to the atmospheric pressure. This tool is crucial for monitoring changes in the weather and predicting atmospheric conditions.
Barometers can also function as altimeters since atmospheric pressure varies with altitude. The use of mercury in barometers helps provide accurate measurements due to its consistent behavior in response to pressure changes.
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