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  2. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    At 1 ppm the solution is a very pale yellow. As the concentration increases the colour becomes a more vibrant yellow, then orange, with the final 10,000 ppm a deep red colour. In science and engineering , the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities , e.g. mole fraction or ...

  3. Air pollutant concentrations - Wikipedia

    en.wikipedia.org/wiki/Air_pollutant_concentrations

    The conversion equations depend on the temperature at which the conversion is wanted (usually about 20 to 25 °C). At an ambient sea level atmospheric pressure of 1 atm (101.325 kPa or 1.01325 bar), the general equation is:

  4. Useful conversions and formulas for air dispersion modeling

    en.wikipedia.org/wiki/Useful_conversions_and...

    Here are the conversion factors for those various expressions of wind speed: 1 m/s = 2.237 statute mile/h = 1.944 knots 1 knot = 1.151 statute mile/h = 0.514 m/s 1 statute mile/h = 0.869 knots = 0.447 m/s. Note: 1 statute mile = 5,280 feet = 1,609 meters

  5. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    0.02 ppm Lead 1 year 0.50 μg/m 3: PM 10 1 day 50 μg/m 3: 1 year 25 μg/m 3: PM 2.5 1 day ... To convert an air pollutant concentration to an AQI, EPA has developed ...

  6. 6 Heart-Healthy Foods You Should be Eating in January ... - AOL

    www.aol.com/6-heart-healthy-foods-eating...

    Heart disease is the No. 1 cause of death in the U.S. Yet, according to the American Heart Association, half of Americans are unaware of this sobering statistic.

  7. Orders of magnitude (molar concentration) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(molar...

    inhaled carbon monoxide induces unconsciousness in 2–3 breaths and death in < 3 min (12 800 ppm) [15] 10 −3: mM 0.32–32 mM: normal range of hydronium ions in stomach acid (pH 1.5–3.5) [16] 5.5 mM: upper bound for healthy blood glucose when fasting [17] 7.8 mM: upper bound for healthy blood glucose 2 hours after eating [17] 10 −2: cM 20 mM

  8. These are the fastest-growing job titles, according to ... - AOL

    www.aol.com/fastest-growing-job-titles-according...

    Hospitality and travel-related roles were among some of the fastest-growing jobs, according to LinkedIn's analysis of user data. (Thomas Barwick/Digital Vision/Getty Images)

  9. How, Exactly, Did This Gator Climb a Fence? - AOL

    www.aol.com/exactly-did-gator-climb-fence...

    Why Did the Gator Climb the Military Base’s Fence? The Jacksonville Naval Air Station is located on a peninsula with the St. John’s River to the west and the Ortega River to the east.