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  2. Imperial and US customary measurement systems - Wikipedia

    en.wikipedia.org/wiki/Imperial_and_US_customary...

    The definition of units of weight above a pound differed between the customary and the imperial system - the imperial system employed the stone of 14 pounds, the hundredweight of 8 stone [Note 6] and the ton of 2240 pounds (20 hundredweight), while the customary system of units did not employ the stone but has a hundredweight of 100 pounds and ...

  3. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    If the mass of an object is estimated as 3.78 ± 0.07 kg, so the actual mass is probably somewhere in the range 3.71 to 3.85 kg, and it is desired to report it with a single number, then 3.8 kg is the best number to report since its implied uncertainty ± 0.05 kg gives a mass range of 3.75 to 3.85 kg, which is close to the measurement range.

  4. Human body weight - Wikipedia

    en.wikipedia.org/wiki/Human_body_weight

    Human body weight is a person's mass or weight.. Strictly speaking, body weight is the measurement of mass without items located on the person. Practically though, body weight may be measured with clothes on, but without shoes or heavy accessories such as mobile phones and wallets, and using manual or digital weighing scales.

  5. Specific strength - Wikipedia

    en.wikipedia.org/wiki/Specific_strength

    The SI unit for specific strength is Pa⋅m 3 /kg, or N⋅m/kg, which is dimensionally equivalent to m 2 /s 2, though the latter form is rarely used. Specific strength has the same units as specific energy , and is related to the maximum specific energy of rotation that an object can have without flying apart due to centrifugal force .

  6. Venus - Wikipedia

    en.wikipedia.org/wiki/Venus

    The density at the surface is 65 kg/m 3 (4.1 lb/cu ft), 6.5% that of water [88] or 50 times as dense as Earth's atmosphere at 293 K (20 °C; 68 °F) at sea level. The CO 2 -rich atmosphere generates the strongest greenhouse effect in the Solar System, creating surface temperatures of at least 735 K (462 °C; 864 °F).

  7. Shot put - Wikipedia

    en.wikipedia.org/wiki/Shot_put

    The shot put is a track and field event involving "putting" (throwing) a heavy spherical ball—the shot—as far as possible. For men, the sport has been a part of the modern Olympics since their revival (1896), and women's competition began in 1948.

  8. Interstellar probe - Wikipedia

    en.wikipedia.org/wiki/Interstellar_probe

    Voyager 1 is a space probe launched by NASA on September 5, 1977. At a distance of about 162.755 AU (2.435 × 10 10 km) as of 4 February 2025, [7] [8] it is the farthest manmade object from Earth. [9] It was later estimated that Voyager 1 crossed the termination shock on December 16, 2004 at a distance of 94 AU from the Sun. [10] [11]

  9. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Post-term: greater than or equal to 42 weeks and 0 days Naegele's rule is a standard way of calculating the due date for a pregnancy when assuming a gestational age of 280 days at childbirth. The rule estimates the expected date of delivery (EDD) by adding a year, subtracting three months, and adding seven days to the origin of gestational age.