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  2. Drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    So, instead of 78/64 inch, or 1 14/64 inch, the size is noted as 1 7/32 inch. Below is a chart providing the decimal-fraction equivalents that are most relevant to fractional-inch drill bit sizes (that is, 0 to 1 by 64ths).

  3. Logarithm - Wikipedia

    en.wikipedia.org/wiki/Logarithm

    In mathematics, the logarithm of a number is the exponent by which another fixed value, the base, must be raised to produce that number.For example, the logarithm of 1000 to base 10 is 3, because 1000 is 10 to the 3 rd power: 1000 = 10 3 = 10 × 10 × 10.

  4. Betelgeuse - Wikipedia

    en.wikipedia.org/wiki/Betelgeuse

    One study found that a not yet directly-observed, dust-modulating star or white dwarf of 1.17 ± 0.7 M ☉ at a distance of 8.60 ± 0.33 AU would be the most likely solution for Betelgeuse's 2170-day secondary periodicity, fluctuating radial velocity, moderate radius and low variation in effective temperature. [193]

  5. Micrometer (device) - Wikipedia

    en.wikipedia.org/wiki/Micrometer_(device)

    Modern micrometer with a reading of 1.639 ± 0.005 mm. Assuming no zero error, this is also the measurement. (One may need to enlarge the image to read it.) Outside, inside, and depth micrometers. The outside micrometer has a unit conversion chart between fractional and decimal inch measurements etched onto the frame

  6. Deuterium - Wikipedia

    en.wikipedia.org/wiki/Deuterium

    Since s = 1 gives a stronger nuclear attraction, the deuterium ground state is in the s = 1, l = 0 state. The same considerations lead to the possible states of an isospin triplet having s = 0, l = even or s = 1, l = odd. Thus, the state of lowest energy has s = 1, l = 1, higher than that of the isospin singlet.

  7. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    The refractive index of liquid water (1.333 at 20 °C (68 °F)) is much higher than that of air (1.0), similar to those of alkanes and ethanol, but lower than those of glycerol (1.473), benzene (1.501), carbon disulfide (1.627), and common types of glass (1.4 to 1.6). The refraction index of ice (1.31) is lower than that of liquid water.

  8. Causes of unemployment in the United States - Wikipedia

    en.wikipedia.org/wiki/Causes_of_unemployment_in...

    A 2014 White House Council of Economic Advisers report concluded that for the 3.1 percentage point reduction in the labor force to population ratio from 2007 to 2013, 1.6 points was due to retirements, 0.5 points was due to the recession, and the remainder was not clearly determined and may be the result of several factors, such as more ...

  9. International Ultraviolet Explorer - Wikipedia

    en.wikipedia.org/wiki/International_Ultraviolet...

    Most space observatories in Earth orbit, such as the Hubble Space Telescope, are in a low Earth orbit in which they spend most of their time operating autonomously because only a small fraction of the Earth's surface can see them at a given time. Hubble, for example, orbits the Earth at an altitude of approximately 600 km (370 mi), while a ...