Презентация по теме ''Barometer''

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A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather. Schematic drawing of a simple mercury barometer

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Mercury barometer was invented by Evangelista Torricelli, Italian scientists in 1644.

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Old barometers from the Musée des Arts et Métiers , Paris In fluid barometer pressure measured by the height of the mercury column in a tube, and the lower atmospheric pressure. Mercury barometers - or rather any other used at meteorological stations.

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In everyday life commonly used mechanical barometers. They contain no liquid. It shows the atmospheric pressure. By lowering the atmospheric pressure box expands slightly, while increasing - compressed. Often practiced several boxes connected in series, and there is a transfer lever system, which turns the arrow moving along a circular scale, scaled by a mercury barometer. Also currently widespread digital barometers.

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There are many other more unusual types of barometer. From variations on the storm barometer. Some, such as the Shark Oil barometer , work only in a certain temperature range, achieved in warmer climates A barometer can also be found in smartphones such as the Samsung Galaxy Nexus smartphone.

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Structure of barometer