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  2. Specific weight - Wikipedia

    en.wikipedia.org/wiki/Specific_weight

    The specific weight, also known as the unit weight (symbol γ, the Greek letter gamma), is a volume-specific quantity defined as the weight W divided by the volume V of a material: = / Equivalently, it may also be formulated as the product of density, ρ, and gravity acceleration, g: = Its unit of measurement in the International System of Units (SI) is newton per cubic metre (N/m 3), with ...

  3. Earth mass - Wikipedia

    en.wikipedia.org/wiki/Earth_mass

    The combined effect is a net loss of material, estimated at 5.5 × 10 7 kg (5.4 × 10 4 long tons) per year. This amount is 10 −17 of the total earth mass. [ citation needed ] The 5.5 × 10 7 kg annual net loss is essentially due to 100,000 tons lost due to atmospheric escape , and an average of 45,000 tons gained from in-falling dust and ...

  4. Irish units of measurement - Wikipedia

    en.wikipedia.org/wiki/Irish_units_of_measurement

    The basic unit of area was the tir-cumaile, "land of three cows", as it was an area of land that was at some point worth three cows.It is sometimes erroneously interpreted as the area needed to graze three cows, but it is far too large for that; in modern Ireland, a cow grazes on about 0.4 ha, so twenty or more could graze a tir-cumaile.

  5. Imperial units - Wikipedia

    en.wikipedia.org/wiki/Imperial_units

    The former Weights and Measures office in Seven Sisters, London (590 Seven Sisters Road). The imperial system of units, imperial system or imperial units (also known as British Imperial [1] or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.

  6. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    For example, the conversion factor between a mass fraction of 1 ppb and a mole fraction of 1 ppb is about 4.7 for the greenhouse gas CFC-11 in air (Molar mass of CFC-11 / Mean molar mass of air = 137.368 / 28.97 = 4.74). For volume fraction, the suffix "V" or "v" is sometimes appended to the parts-per notation (e.g. ppmV, ppbv, pptv).

  7. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    10-4 Say Again (Repeat) Repeat your message. 10-9 Stand By Stop transmitting and wait for further instructions. 10-12 Disregard (Recall) Cancel your present assignment. 10-22 Off Radio Unit is not capable of being contacted by radio, but may be "available." 10-7B On Radio Unit is capable of being contacted by radio, but not necessarily "available."

  8. Étude Op. 10, No. 4 (Chopin) - Wikipedia

    en.wikipedia.org/wiki/Étude_Op._10,_No._4_(Chopin)

    Excerpt from Étude Op. 10, No. 4. Étude Op. 10, No. 4 in C ♯ minor, known as the Torrent étude, is a study for solo piano composed by Frédéric Chopin in 1830. It was first published in 1833 in France, [1] Germany, [2] and England [3] as the fourth piece of his Études Op. 10.

  9. Heavy Expanded Mobility Tactical Truck - Wikipedia

    en.wikipedia.org/wiki/Heavy_Expanded_Mobility...

    The Heavy Expanded Mobility Tactical Truck (HEMTT) is an eight-wheel drive, diesel-powered, 10-short-ton (9,100 kg) tactical truck. [2] The M977 HEMTT first entered service in 1982 with the United States Army as a replacement for the M520 Goer, and since that date has remained in production for the U.S. Army and other nations.