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In fractions like "2 nanometers per meter" (2 n m / m = 2 nano = 2×10 −9 = 2 ppb = 2 × 0.000 000 001), so the quotients are pure-number coefficients with positive values less than or equal to 1. When parts-per notations, including the percent symbol (%), are used in regular prose (as opposed to mathematical expressions), they are still pure ...
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
As an example, a measured particulates concentration of 200 mg/m 3 in a dry gas that has a measured 8 volume % CO 2 is: 200 × ( 12 ÷ 8 ) = 300 mg/m 3. when corrected to a dry gas having a specified reference CO 2 content of 12 volume %.
where TDS is expressed in mg/L and EC is the electrical conductivity in microsiemens per centimeter at 25 °C. The conversion factor k e varies between 0.55 and 0.8. [5] Some TDS meters use an electrical conductivity measurement to the ppm using the above formula. Regarding units, 1 ppm indicates 1 mg of dissolved solids per 1,000 g of water. [6]
1000 mg/m 3-moly-mo: 100-61-8: 0921: Monomethyl aniline: 438 mg/m 3: 100 ppm: 100618: 110-91-8: 0302: Morpholine: 1400 mg/m 3: 4984 ppm: 110918 (10% Lower explosive limit LEL) 8030-30-6-Naphtha (coal tar) 4500 mg/m 3: 1000 ppm: 8030306 (10% Lower explosive limit LEL) 91-20-3: 0667: Naphthalene: 1310 mg/m 3: 250 ppm: 91203: 13463-39-3: 0064 ...
Family and friends are back at home and work following the holiday weekend, but fridges may still be packed full of Thanksgiving leftovers.For folks wondering how long the turkey, potatoes and ...
A weekend getaway became a nightmare for one couple when biting ants fell from the ceiling onto them as they slept. Here's how to keep it from happening to you.
" indicates that no standard has been identified by editors of this article and ns indicates that no standard exists. μg/L = micrograms per litre, or 0.001 ppm; mg/L = 1 ppm, or 1000 μg/L. * means action level; not a concentration standard.