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  2. Binary prefix - Wikipedia

    en.wikipedia.org/wiki/Binary_prefix

    However, the capacity was also quoted "1.2 MB", [41] which was a hybrid decimal and binary notation, since the "M" meant 1000 × 1024. The precise value was 1.2288 MB (decimal) or 1.171 875 MiB (binary). The 5.25-inch Apple Disk II had 256 bytes per sector, 13 sectors per track, 35 tracks per side, or a total capacity of 116 480 bytes.

  3. Nines (notation) - Wikipedia

    en.wikipedia.org/wiki/Nines_(notation)

    The purity of a gas is generally expressed as a grade prefixed with the letter N (rather than postfixed), indicating the "number of nines" in the percentage or decimal fraction. For example, a N2.0 gas is 99% (two nines) pure and 1% impurities by volume; a N6.0 gas is 99.9999% (six nines) pure, with 1 part per million (1 ppm or 1 vpm, volume ...

  4. Grading systems by country - Wikipedia

    en.wikipedia.org/wiki/Grading_systems_by_country

    The lowest grade is 2.00; grades below 3.00 are failing grades, and the highest is 6.00. ... If the grade would be a 5.49 and one decimal is used, the 5.49 will be a ...

  5. Power of two - Wikipedia

    en.wikipedia.org/wiki/Power_of_two

    Visualization of powers of two from 1 to 1024 (2 0 to 2 10) as base-2 Dienes blocks. A power of two is a number of the form 2 n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent.

  6. Programme for International Student Assessment - Wikipedia

    en.wikipedia.org/wiki/Programme_for...

    Mathematics 30 11 275,000 UK disqualified from data analysis, due to its low response rate. [33] Also included test in problem solving. 2006 Science 30 27 400,000 Reading scores for US disqualified from analysis due to misprint in testing materials. [34] 2009 [35] Reading 34 41 + 10 470,000 10 additional non-OECD countries took the test in 2010 ...

  7. College admissions in the United States - Wikipedia

    en.wikipedia.org/wiki/College_admissions_in_the...

    Advisors Mamlet and VanDeVelde suggest that students proactively try to explain an unusual grade, such as a low grade in a core course. [140] There are online databases available to help students write cogent essays. [141]

  8. Dark energy - Wikipedia

    en.wikipedia.org/wiki/Dark_energy

    The "cosmological constant" is a constant term that can be added to Einstein field equations of general relativity.If considered as a "source term" in the field equation, it can be viewed as equivalent to the mass of empty space (which conceptually could be either positive or negative), or "vacuum energy".

  9. Science - Wikipedia

    en.wikipedia.org/wiki/Science

    Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1] [2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the behavioural sciences (e.g., economics, psychology, and sociology ...