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  2. List of humorous units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_humorous_units_of...

    Volume was measured in ngogn (equal to 1000 cubic potrzebies), mass in blintz (equal to the mass of 1 ngogn of halva, which is "a form of pie [with] a specific gravity of 3.1416 and a specific heat of .31416"), and time in seven named units (decimal powers of the average earth rotation, equal to 1 "clarke").

  3. Grading systems by country - Wikipedia

    en.wikipedia.org/wiki/Grading_systems_by_country

    This stems from the practice that exams were traditionally given by 3 examiners. Each had to rate the student's examination performance on a 1–10 scale, and the final grade was the sum of the three ratings. On a 1–10 scale, passing is 6, so on a 1–30 scale the minimum passing grade is 3*6 = 18.

  4. Ship model - Wikipedia

    en.wikipedia.org/wiki/Ship_model

    Measuring the hatch in metric, you measure 25 mm. T he conversion factor for 1/4" to 3/16', according to the conversion table is .75. So 25 mm x .75 = 18.75 mm, or about 19 mm. That is the hatch size in 3/16" scale. Conversion is a fairly simple task once you start measuring in metric and converting according to the scale.

  5. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    If the mean =, the first factor is 1, and the Fourier transform is, apart from a constant factor, a normal density on the frequency domain, with mean 0 and variance ⁠ / ⁠. In particular, the standard normal distribution ⁠ φ {\displaystyle \varphi } ⁠ is an eigenfunction of the Fourier transform.

  6. Kardashev scale - Wikipedia

    en.wikipedia.org/wiki/Kardashev_scale

    Large-scale application of fusion power: In terms of mass–energy equivalence, Type I implies the conversion of about 2 kg of matter to energy per second. An equivalent energy release could theoretically be achieved by fusing about 280 kg of hydrogen into helium per second, [ 83 ] a rate roughly equivalent to 8.9 × 10 9 kg/year.

  7. Fine chemical - Wikipedia

    en.wikipedia.org/wiki/Fine_chemical

    In terms of molecular structure, one distinguishes first between low-molecular-weight (LMW) and high-molecular-weight (HMW) products. The generally accepted threshold between LMW and HMW is a molecular weight of about 700 g/mol. LMW fine chemicals, also designated as small molecules, are produced by traditional chemical synthesis, by microorganisms (fermentation or biotransformation), or by ...

  8. Behavior of nuclear fuel during a reactor accident - Wikipedia

    en.wikipedia.org/wiki/Behavior_of_nuclear_fuel...

    Many experiments suggested quite low conversion of thermal to mechanical energy, whereas the theoretical models available appeared to suggest that much higher efficiencies were possible. A NEA / OECD report was written on the subject in 2000 which states that a steam explosion caused by contact of corium with water has four stages.