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  2. Density of air - Wikipedia

    en.wikipedia.org/wiki/Density_of_air

    At 20 °C and 101.325 kPa, dry air has a density of 1.2041 kg/m 3. At 70 °F and 14.696 psi, dry air has a density of 0.074887 lb/ft 3. The following table illustrates the air density–temperature relationship at 1 atm or 101.325 kPa: [citation needed]

  3. Air–fuel ratio - Wikipedia

    en.wikipedia.org/wiki/Air–fuel_ratio

    Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process. The combustion may take place in a controlled manner such as in an internal combustion engine or industrial furnace, or may result in an explosion (e.g., a dust explosion ).

  4. Volumetric flow rate - Wikipedia

    en.wikipedia.org/wiki/Volumetric_flow_rate

    Volumetric flow rate is defined by the limit [3] = ˙ = =, that is, the flow of volume of fluid V through a surface per unit time t.. Since this is only the time derivative of volume, a scalar quantity, the volumetric flow rate is also a scalar quantity.

  5. Air mass - Wikipedia

    en.wikipedia.org/wiki/Air_mass

    The qualities of arctic air are developed over ice and snow-covered ground. Arctic air is deeply cold, colder than polar air masses. Arctic air can be shallow in the summer, and rapidly modify as it moves equatorward. [8] Polar air masses develop over higher latitudes over the land or ocean, are very stable, and generally shallower than arctic air.

  6. Teen rescued after falling into Northern California mine shaft

    www.aol.com/teen-rescued-falling-northern...

    The teenager was exploring a Gold Rush-era mine shaft that was about six feet deep and 30 feet back when he fell and became stuck. After about 15 minutes, a friend who was with the teen called for ...

  7. Atmospheric pressure - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_pressure

    Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa ), which is equivalent to 1,013.25 millibars , [ 1 ] 760 mm Hg , 29.9212 inches Hg , or 14.696 psi . [ 2 ]

  8. Your February Love Horoscope Is Full of Unexpected Romances ...

    www.aol.com/february-love-horoscope-full...

    The good news is Venus will enter Aries on Feb. 4, supercharging your romantic fifth house of love, passion and pleasure — this turns up the heat in your love life as an air of spontaneity and ...

  9. Your complete guide to tariffs: How much you’ll pay, and when

    www.aol.com/finance/everything-know-trump...

    Gas, food and alcohol prices would also rise if Trump imposed Canadian and Mexican tariffs.. Sneaker prices would rise if Trump raised tariffs on China: About 99% of shoes sold in the United ...