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  2. Thermal velocity - Wikipedia

    en.wikipedia.org/wiki/Thermal_velocity

    If is defined as the root mean square of the velocity in any one dimension (i.e. any single direction ... Water vapor: 585 m/s (1,920 ft/s) Nitrogen:

  3. Wave-making resistance - Wikipedia

    en.wikipedia.org/wiki/Wave-making_resistance

    When the vessel exceeds a "speed–length ratio" (speed in knots divided by square root of length in feet) of 0.94, it starts to outrun most of its bow wave, the hull actually settles slightly in the water as it is now only supported by two wave peaks. As the vessel exceeds a speed-length ratio of 1.34, the wavelength is now longer than the ...

  4. Square number - Wikipedia

    en.wikipedia.org/wiki/Square_number

    Square number 16 as sum of gnomons. In mathematics, a square number or perfect square is an integer that is the square of an integer; [1] in other words, it is the product of some integer with itself. For example, 9 is a square number, since it equals 3 2 and can be written as 3 × 3.

  5. Derek J. de Solla Price - Wikipedia

    en.wikipedia.org/wiki/Derek_J._de_Solla_Price

    Derek John de Solla Price (22 January 1922 – 3 September 1983) was a British physicist, historian of science, and information scientist.He was known for his investigation of the Antikythera mechanism, an ancient Greek planetary computer, and for quantitative studies on scientific publications, which led to his being described as the "Herald of scientometrics".

  6. List of eponymous laws - Wikipedia

    en.wikipedia.org/wiki/List_of_eponymous_laws

    Casper's Dictum is a law in forensic medicine that states the ratio of time a body takes to putrefy in different substances – 1:2:8 in air, water and earth. Cassie's law describes the effective contact angle θ c for a liquid on a composite surface. Cassini's laws provide a compact description of the motion of the Moon.

  7. Tree crown measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_crown_measurement

    The average crown spread is the average horizontal width of the crown, taken from dripline to dripline as one moves around the crown. The dripline is the outer boundary to the area located directly under the outer circumference of the tree branches. When the tree canopy gets wet, any excess water is shed to the ground along this dripline.

  8. Reference materials for stable isotope analysis - Wikipedia

    en.wikipedia.org/wiki/Reference_materials_for...

    The δ values and absolute isotope ratios of common reference materials are summarized in Table 1 and described in more detail below. Alternative values for the absolute isotopic ratios of reference materials, differing only modestly from those in Table 1, are presented in Table 2.5 of Sharp (2007) [1] (a text freely available online), as well as Table 1 of the 1993 IAEA report on isotopic ...