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  2. Barometer question - Wikipedia

    en.wikipedia.org/wiki/Barometer_question

    A colleague of Calandra posed the barometer question to a student, expecting the correct answer: "the height of the building can be estimated in proportion to the difference between the barometer readings at the bottom and at the top of the building". [19]

  3. History of scuba diving - Wikipedia

    en.wikipedia.org/wiki/History_of_scuba_diving

    A scuba set is characterized by full independence from the surface during use, by providing breathing gas carried by the diver. Early attempts to reach this autonomy were made in the 18th century by the Englishman John Lethbridge, who invented and successfully built his own underwater diving machine in 1715, but though the air supply was carried in the diving apparatus, it relied on surface ...

  4. Pressure measurement - Wikipedia

    en.wikipedia.org/wiki/Pressure_measurement

    The most common choices for a manometer's fluid are mercury (Hg) and water; water is nontoxic and readily available, while mercury's density allows for a shorter column (and so a smaller manometer) to measure a given pressure. The abbreviation "W.C." or the words "water column" are often printed on gauges and measurements that use water for the ...

  5. Dynamic pressure - Wikipedia

    en.wikipedia.org/wiki/Dynamic_pressure

    A flow of air through a venturi meter, showing the columns connected in a U-shape (a manometer) and partially filled with water.The meter is "read" as a differential pressure head in cm or inches of water and is equivalent to the difference in velocity head.

  6. Pitot tube - Wikipedia

    en.wikipedia.org/wiki/Pitot_tube

    Types of pitot tubes A pitot-static tube connected to a manometer Pitot tube on Kamov Ka-26 helicopter A Formula One car during testing with frames holding many pitot tubes Location of pitot tubes on a Boeing 777. A pitot tube (/ ˈ p iː t oʊ / PEE-toh; also pitot probe) measures fluid flow velocity.

  7. Manometry - Wikipedia

    en.wikipedia.org/wiki/Manometry

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us

  8. Mass flow meter - Wikipedia

    en.wikipedia.org/wiki/Mass_flow_meter

    A mass flow meter of the Coriolis type. A mass flow meter, also known as an inertial flow meter, is a device that measures mass flow rate of a fluid traveling through a tube.

  9. Torricelli's experiment - Wikipedia

    en.wikipedia.org/wiki/Torricelli's_experiment

    For much of human history, the pressure of gases like air was ignored, denied, or taken for granted, but as early as the 6th century BC, Greek philosopher Anaximenes of Miletus claimed that all things are made of air that is simply changed by varying levels of pressure.

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