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In the oil industry, mud weight is the density of the drilling fluid and is normally measured in pounds per gallon (lb/gal) (ppg) or pound cubic feet (pcf) . [1] In the field it is measured using a mud scale or mud balance. Mud can weigh up to 22 or 23 ppg. A gallon of water typically weighs 8.33 pounds (or 7.48 ppg).
Liquid bleach, often called just bleach, is a common chemical household product that consists of a dilute solution of sodium hypochlorite (NaClO) and other secondary ingredients. It is a chlorine releasing bleaching agent widely used to whiten clothes and remove stains, as a disinfectant to kill germs , and for several other uses.
A US liquid gallon contains about 3.7854 kilograms (8.3454 lb) of water at 3.98 °C (39.16 °F), and is about five-sixths of an imperial gallon. There are four quarts in a gallon, two pints in a quart and 16 US fluid ounces in a US pint , making the US fluid ounce 1 / 128 of a US gallon.
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One US fluid ounce is 1 ⁄ 16 of a US pint, 1 ⁄ 32 of a US quart, and 1 ⁄ 128 of a US gallon. The teaspoon, tablespoon, and cup are defined in terms of a fluid ounce as 1 ⁄ 6 , 1 ⁄ 2 , and 8 fluid ounces respectively.
An imperial fluid ounce is 1 ⁄ 20 of an imperial pint, 1 ⁄ 160 of an imperial gallon or exactly 28.4130625 mL. A US customary fluid ounce is 1 ⁄ 16 of a US liquid pint and 1 ⁄ 128 of a US liquid gallon or exactly 29.5735295625 mL, making it about 4.08% larger than the imperial fluid ounce. A US food labeling fluid ounce is exactly 30 mL.
It is equal to one picocurie of Sr-90 per gram of body calcium. Since about 2% of the human body mass is calcium, and Sr-90 has a half-life of 28.78 years, releasing 6.697+2.282 MeV per disintegration, this works out to about 1.065 × 10 −12 grays per second. The permissible body burden was established at 1,000 S.U.
The time required to remove half of the chloramine from 10 US gallons (38 L; 8.3 imp gal) of water by boiling is 26.6 minutes, whereas the half-life of free chlorine in boiling 10 gallons of water is only 1.8 minutes. [16] Aging may take weeks to remove chloramines, whereas chlorine disappears in a few days. [17] [18]