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  2. Drag coefficient - Wikipedia

    en.wikipedia.org/wiki/Drag_coefficient

    Drag coefficients in fluids with Reynolds number approximately 10 4 [1] [2] Shapes are depicted with the same projected frontal area. In fluid dynamics, the drag coefficient (commonly denoted as: , or ) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment, such as air or water.

  3. Dimension - Wikipedia

    en.wikipedia.org/wiki/Dimension

    A temporal dimension is one way to measure physical change. It is perceived differently from the three spatial dimensions in that there is only one of it, and that we cannot move freely in time but subjectively move in one direction. The equations used in physics to model reality do not treat time in the same way that humans commonly perceive it.

  4. Silver - Wikipedia

    en.wikipedia.org/wiki/Silver

    Auricular basin with scenes from the story of Diana and Actaeon; 1613; length: 50 cm, height: 6 cm, width: 40 cm; Rijksmuseum (Amsterdam, the Netherlands) French Rococo tureen; 1749; height: 26.3 cm, width: 39 cm, depth: 24 cm; Metropolitan Museum of Art

  5. Image sensor format - Wikipedia

    en.wikipedia.org/wiki/Image_sensor_format

    Although the most common medium format film, the 120 roll, is 6 cm (2.4 in) wide, and is most commonly shot square, the most common "medium-format" digital sensor sizes are approximately 48 mm × 36 mm (1.9 in × 1.4 in), which is roughly twice the size of a full-frame DSLR sensor format.

  6. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    The human body contains from 55% to 78% water, depending on body size. [ 127 ] [ user-generated source? ] To function properly, the body requires between one and seven litres (0.22 and 1.54 imp gal; 0.26 and 1.85 US gal) [ citation needed ] of water per day to avoid dehydration ; the precise amount depends on the level of activity, temperature ...

  7. Neutron star - Wikipedia

    en.wikipedia.org/wiki/Neutron_star

    A 2021 measurement of the pulsar PSR J0740+6620 was able to constrain the radius of a 1.4 solar mass neutron star to 12.33 +0.76 −0.8 km with 95% confidence. [ 30 ] These mass-radius constraints, combined with chiral effective field theory calculations, tightens constraints on the neutron star equation of state.

  8. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    The symmetric stretching mode does not create an electric dipole so is not observed in IR spectroscopy, but it is detected in Raman spectroscopy at 1388 cm −1 (wavelength 7.20 μm), with a Fermi resonance doublet at 1285 cm −1. [20] In the gas phase, carbon dioxide molecules undergo significant vibrational motions and do not keep a fixed ...

  9. Uranus - Wikipedia

    en.wikipedia.org/wiki/Uranus

    Size comparison of Earth and Uranus. Uranus's mass is roughly 14.5 times that of Earth, making it the least massive of the giant planets. Its diameter is slightly larger than Neptune's at roughly four times that of Earth. A resulting density of 1.27 g/cm 3 makes Uranus the second least dense planet, after Saturn.

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