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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 mass fraction. Since these fractions are quantity-per-quantity measures, they are pure numbers with no associated units of measurement. Commonly used are parts-per-million (ppm, 10 ...
Wind speed conversion factors. Meteorological data includes wind speeds which may be expressed as statute miles per hour, knots, or meters per second. 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.
An individual score (Individual Air Quality Index, IAQI) is calculated using breakpoint concentrations below, and using same piecewise linear function to calculate intermediate values as the US AQI scale. and The final AQI value can be calculated either per hour or per 24 hours and is the max of these six scores.
The atmospheric methane concentration has continued to increase since 2011 to an average global concentration of 1911.8 ± 0.6 ppb as of 2022. [16] The May 2021 peak was 1891.6 ppb, while the April 2022 peak was 1909.4 ppb, a 0.9% increase. [55] Annual atmospheric methane concentrations from 1990 to 2021.
Ree Drummond's daughter Paige's wedding preparation is in full swing!. On Sunday, Sept. 15, the Food Network star, 55, opened up about taking Paige, 25, wedding dress shopping in her Pioneer Woman ...
Rank Country / Region City Average PM2.5 (ug/m3) 1 Switzerland Zürich: 0.49 2 Australia Perth: 1.61 3 South Africa Richards Bay: 2.38 4 Australia Hobart: 2.66 5 Iceland Reykjavík: 3.38
Tommy Cash, the country musician and younger brother of late music icon Johnny Cash, died Friday evening. He was 84. The Johnny Cash Museum confirmed Tommy Cash’s death in a statement Saturday.
According to a statement from the Michigan State Police, a 2-year-old girl “got out of her bed and walked out of the house” while her parents were working around the family’s home in Allen ...