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  2. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    On scientific calculators, it is usually known as "SCI" display mode. In scientific notation, nonzero numbers are written in the form. or m times ten raised to the power of n, where n is an integer, and the coefficient m is a nonzero real number (usually between 1 and 10 in absolute value, and nearly always written as a terminating decimal).

  3. Order of magnitude - Wikipedia

    en.wikipedia.org/wiki/Order_of_magnitude

    [contradictory] For example, the number 4 000 000 has a logarithm (in base 10) of 6.602; its order of magnitude is 6. When truncating, a number of this order of magnitude is between 10 6 and 10 7. In a similar example, with the phrase "seven-figure income", the order of magnitude is the number of figures minus one, so it is very easily ...

  4. Richter scale - Wikipedia

    en.wikipedia.org/wiki/Richter_scale

    2.0–2.9 Minor I Felt slightly by some people. No damage to buildings. Over one million per year 3.0–3.9 Slight II to III Often felt by people, but very rarely causes damage. Shaking of indoor objects can be noticeable. Over 100,000 per year 4.0–4.9 Light IV to V Noticeable shaking of indoor objects and rattling noises.

  5. Orders of magnitude (time) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(time)

    5.4 × 10 83 Qs (1.7 × 10 106 years): The approximate lifespan of a supermassive black hole with a mass of 20 trillion solar masses [21] 10 10 10 76.66 {\displaystyle 10^{10^{10^{76.66}}}} Qs: The scale of an estimated Poincaré recurrence time for the quantum state of a hypothetical box containing an isolated black hole of stellar mass [ 22 ...

  6. Power (statistics) - Wikipedia

    en.wikipedia.org/wiki/Power_(statistics)

    Power (statistics) In frequentist statistics, power is a measure of the ability of an experimental design and hypothesis testing setup to detect a particular effect if it is truly present. In typical use, it is a function of the test used (including the desired level of statistical significance), the assumed distribution of the test (for ...

  7. Quaternary numeral system - Wikipedia

    en.wikipedia.org/wiki/Quaternary_numeral_system

    v. t. e. Quaternary / kwəˈtɜːrnəri / is a numeral system with four as its base. It uses the digits 0, 1, 2, and 3 to represent any real number. Conversion from binary is straightforward. Four is the largest number within the subitizing range and one of two numbers that is both a square and a highly composite number (the other being thirty ...

  8. Eosinophils and Eosinophil Count Test - WebMD

    www.webmd.com/asthma/eosinophil-count-facts

    Eosinophils make up 0.0 to 6.0 percent of your blood. The absolute count is the percentage of eosinophils multiplied by your white blood cell count. The count may range a bit between different ...

  9. Emissivity - Wikipedia

    en.wikipedia.org/wiki/Emissivity

    Emissivity of a body at a given temperature is the ratio of the total emissive power of a body to the total emissive power of a perfectly black body at that temperature. Following Planck's law, the total energy radiated increases with temperature while the peak of the emission spectrum shifts to shorter wavelengths.