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  2. Grain per gallon - Wikipedia

    en.wikipedia.org/wiki/Grain_per_gallon

    The grain per gallon (gpg) is a unit of water hardness defined as 1 grain (64.8 milligrams) of calcium carbonate dissolved in 1 US gallon of water (3.785412 L). It translates into 1 part in about 58,000 parts of water or 17.1 parts per million (ppm).

  3. Grain (unit) - Wikipedia

    en.wikipedia.org/wiki/Grain_(unit)

    Grains are commonly used to measure the mass of bullets and propellants. [11] [12] In archery, the grain is the standard unit used to weigh arrows. [13] In North America, the hardness of water is often measured in grains per U.S. gallon (gpg) of calcium carbonate equivalents.

  4. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    ounce (avoirdupois) per cubic foot oz/ft 3: ≡ oz/ft 3: ≈ 1.001 153 961 kg/m 3: ounce (avoirdupois) per cubic inch oz/in 3: ≡ oz/in 3: ≈ 1.729 994 044 × 10 3 kg/m 3: ounce (avoirdupois) per gallon (imperial) oz/gal ≡ oz/gal ≈ 6.236 023 291 kg/m 3: ounce (avoirdupois) per gallon (US fluid) oz/gal ≡ oz/gal ≈ 7.489 151 707 kg/m 3 ...

  5. Useful conversions and formulas for air dispersion modeling

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

    0.1 × ( 12 ÷ 8 ) = 0.15 grain per dscf when corrected to a gas having a specified reference CO 2 content of 12 volume %. Notes: Although ppmv and grains per dscf have been used in the above examples, concentrations such as ppbv (i.e., parts per billion by volume), volume percent, grams per dscm and many others may also be used.

  6. Bushel - Wikipedia

    en.wikipedia.org/wiki/Bushel

    = 8 imperial gallons = 4 imperial pecks = 36.368 72 litres: ≈ 8.25645 US dry gallons ≈ 9.60760 US fluid gallons ≈ 2 219.36 cubic inches: ≈ 1.284 35 cubic feet 1 US bushel [6] = 8 US dry gallons = 4 US pecks = 2 150.42 cubic inches = 1.244 46 cubic feet = 35.239 070 166 88 litres ≈ 9.3092 US fluid gallons ≈ 7.7515 imperial gallons

  7. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    In granulometry, the particle-size distribution (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or a mathematical function that defines the relative amount, typically by mass, of particles present according to size. [1]

  8. Quarter (unit) - Wikipedia

    en.wikipedia.org/wiki/Quarter_(unit)

    This quarter was a unit of 8 bushels of 8 gallons each, understood at the time as a measure of both weight and volume: the grain gallon or half-peck was composed of 76,800 grains weight; the ale gallon was composed of the ale filling an equivalent container; and the wine gallon was composed of the wine weighing an equivalent amount to a full ...

  9. Dry measure - Wikipedia

    en.wikipedia.org/wiki/Dry_measure

    In US customary units, most units of volume exist both in a dry and a liquid version, with the same name, but different values: the dry hogshead, dry barrel, dry gallon, dry quart, dry pint, etc. The bushel and the peck are only used for dry goods. Imperial units of volume are the same for both dry and liquid goods. They have a different value ...