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A barometer: with baro meaning weight or pressure.
http://wiki.answers.com/Q/What_instrument_is_used_to_me...
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This instrument is used to measure air pressure. What is a barometer?
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www.regentsearthscience.com/jeopardy/meteorology/ins200...
www.regentsearthscience.com/jeopardy/meteorology/ins200.htm
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The instrument that is used to measure air pressure is called a barometer. The basic function of a barometer is to balance the weight of mercury in a glass tube against atmospheric pressure. If the weight of mercury is less than atmospheric...
http://answers.ask.com/Consumer_Electronics/Other/what_...
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An instrument used by weather forecasters and scientists to measure air pressure at any given moment for a particular place. Air pressure is usually measured in millibars or in inches of mercury.
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kids.earth.nasa.gov/archive/air_pressure/glossary.html
kids.earth.nasa.gov/archive/air_pressure/glossary.html
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A barometer is used to measure atmospheric pressure. There are several different types of barometers: water-based, mercury and aneroid.
http://www.faq4me.net/Homework_Help/1573651.htm
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USATODAY.com Latest News ... The instruments that measure air pressure are called barometers, from Greek words for weight and measure. ... Another type of barometer, called an aneroid barometer, is more commonly used today in meteorology and aviation because it takes up much less space and is more accurate.
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www.usatoday.com/weather/wbaromtr.htm
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Meteorologists, the scientists who study the weather, call air pressure "Barometric Pressure." A barometer is a weather instrument used to measure the air pressure. Changes in air pressure usually mean a change in the weather.
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www.usoe.k12.ut.us/curr/science/core/4th/4thSciber/weat...
www.usoe.k12.ut.us/curr/science/core/4th/4thSciber/weather/html/baromet.htm
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4 is a circuit diagram for a measuring instrument used with the present probe. In FIG. ... Taking into account the elliptical shape of the tube 2, it is in fact apparent that the air jet which is discharged through the slit 27, for example, will apply a greater force to the oppositely-facing internal wall of the tube 2 than...
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www.freepatentsonline.com/3867691.html
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Barometer - Wikipedia, the free encyclopedia
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A barometer is an instrument used to measure atmospheric pressure. It can measure the pressure exerted by the atmosphere by using water, air, or mercury. Pressure tendency can forecast short term ch...
en.wikipedia.org/wiki/Barometer
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