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  2. Weight plate - Wikipedia

    en.wikipedia.org/wiki/Weight_plate

    [8] [19] Tom Lincir, founder of the Ivanko Barbell Company, has encountered 45-pound (20.4 kg) plates weighing as little as 38 pounds (17.2 kg), or as much as 59 pounds (26.8 kg). [ 20 ] Plates can be weighed, and the equipment marked (using a paint pen or other permanent marker ) with the true weight.

  3. Olympic weightlifting - Wikipedia

    en.wikipedia.org/wiki/Olympic_weightlifting

    The color designations for these iron plates are as follows: 1 kg is green, 1.5 kg is yellow, 2 kg is blue, 2.5 kg is red, 5 kg and 0.5 kg are white. It is useful to note the color assignment of these iron plates is consistent with the heavier bumper plates (i.e. 1 kg and 10 kg are green, 1.5 kg and 15 kg are yellow, etc.).

  4. International Prototype of the Kilogram - Wikipedia

    en.wikipedia.org/wiki/International_prototype_of...

    Gy = J/kg = ⁠ kg m 2 /s 2 / kg ⁠ = m 2 /s 2; S = 1/Ω = ⁠ 10 −7 s / k A m ⁠ H = Ω s = 10 7 k A m; Because the magnitude of many of the units composing the SI system of measurement was until 2019 defined by its mass, the quality of the IPK was diligently protected to preserve the integrity of the SI system.

  5. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    7–8 × 10 36 kg The supermassive black hole at the center of the Milky Way, associated with the radio source Sagittarius A* (3.7±0.2 × 10 6 M ☉) [165] 8 × 10 36 kg Omega centauri, the largest globular cluster in the Milky Way, containing approximately 10 million stars. 10 37 10 38 10 39 10 40 10 41: 1.98 × 10 41 kg

  6. Barbell - Wikipedia

    en.wikipedia.org/wiki/Barbell

    Stating that bar should weigh 25 kg (55 lb) with collars on, effectively permits use of 20 kg (44 lb) bars only, because same as IWF, [3] IPF requires collars to weigh 2.5 kg (5.5 lb) each. [6] The total weight of the barbell varies based on the type and number of plates loaded onto the ends of the bar and the lift being performed, and easily ...

  7. Quintal - Wikipedia

    en.wikipedia.org/wiki/Quintal

    In France it used to be defined as 100 livres (pounds), about 48.95 kg (108 lb), and has been redefined as 100 kg (mesures usuelles), thus called metric quintal with symbol qq. In Spain , the quintal is still defined as 100 libras , or about 46 kg (101 lb), but the metric quintal is also defined as 100 kg; [ 3 ] In Portugal a quintal is 128 ...

  8. Kilogram - Wikipedia

    en.wikipedia.org/wiki/Kilogram

    The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J⋅s, which is equal to kg⋅m 2 ⋅s −1, where the metre and the second are defined in terms of c and Δν Cs. —

  9. History of measurement - Wikipedia

    en.wikipedia.org/wiki/History_of_measurement

    Today only the stone continues in customary use for measuring personal body weight. The present stone is 14 pounds (~6.35 kg), but an earlier unit appears to have been 16 pounds (~7.25 kg). The other units were multiples of 2, 8, and 160 times the stone, or 28, 112, and 2240 pounds (~12.7 kg, 50.8 kg, 1016 kg), respectively.