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  2. Kugelpanzer - Wikipedia

    en.wikipedia.org/wiki/Kugelpanzer

    The Kugelpanzer ("ball tank") is a one-man armoured vehicle built by Nazi Germany during World War II. The history of the vehicle is practically unknown other than the fact that at least one example was exported to the Empire of Japan and used by the Kwantung Army. The machine remains something of a mystery due to the lack of records and the ...

  3. PSR J0737−3039 - Wikipedia

    en.wikipedia.org/wiki/PSR_J0737%E2%88%923039

    A pulsar and a normal star; e.g, PSR J0045−7319, a system that is composed of a pulsar and main-sequence B star. Theoretically, a pulsar-black hole system is possible and would be of enormous scientific interest but no such system has yet been identified.

  4. Specific volume - Wikipedia

    en.wikipedia.org/wiki/Specific_volume

    In this case, the unit is the centimeter cubed per gram (cm 3 /g or cm 3 ·g −1). To convert m 3 /kg to cm 3 /g, multiply by 1000; conversely, multiply by 0.001. Specific volume is inversely proportional to density. If the density of a substance doubles, its specific volume, as expressed in the same base units, is cut in half.

  5. Relative density - Wikipedia

    en.wikipedia.org/wiki/Relative_density

    Since the density of dry air at 101.325 kPa at 20 °C is [10] 0.001205 g/cm 3 and that of water is 0.998203 g/cm 3 we see that the difference between true and apparent relative densities for a substance with relative density (20 °C/20 °C) of about 1.100 would be 0.000120. Where the relative density of the sample is close to that of water (for ...

  6. Dynamic pressure - Wikipedia

    en.wikipedia.org/wiki/Dynamic_pressure

    In fluid dynamics, dynamic pressure (denoted by q or Q and sometimes called velocity pressure) is the quantity defined by: [1] = where (in SI units): q is the dynamic pressure in pascals (i.e., N/m 2, ρ (Greek letter rho) is the fluid mass density (e.g. in kg/m 3), and; u is the flow speed in m/s.

  7. PSR J1719−1438 b - Wikipedia

    en.wikipedia.org/wiki/PSR_J1719%E2%88%921438_b

    PSR J1719−1438 b is an extrasolar planet that was discovered on August 25, 2011, in orbit around PSR J1719−1438, a millisecond pulsar. The pulsar planet is most likely composed largely of crystalline carbon but with a density far greater than diamond. [1] [2] PSR J1719-1438 b orbits so closely to its host star that its orbit would fit ...

  8. PSR J0952–0607 - Wikipedia

    en.wikipedia.org/wiki/PSR_J0952–0607

    PSR J0952–0607 is a massive millisecond pulsar in a binary system, located between 3,200–5,700 light-years (970–1,740 pc) from Earth in the constellation Sextans. [6] It holds the record for being the most massive neutron star known as of 2022, with a mass 2.35 ± 0.17 times that of the Sun—potentially close to the Tolman–Oppenheimer–Volkoff mass upper limit for neutron stars.

  9. IXPE - Wikipedia

    en.wikipedia.org/wiki/IXPE

    Ball Aerospace & Technologies OHB Italia: Launch mass: 330 kg (730 lb) [1] Payload mass: 170 kg (370 lb) Dimensions: 1.1 m (3 ft 7 in) in diameter and 5.2 m (17 ft) tall, fully extended Solar array: 2.7 m (8 ft 10 in) fully deployed: Start of mission; Launch date: 9 December 2021, 06:00 UTC [3] Rocket: Falcon 9, B1061.5: Launch site: Kennedy ...