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  2. Audio tape specifications - Wikipedia

    en.wikipedia.org/wiki/Audio_tape_specifications

    As well as 1 ⁄ 4 in (6.4 mm) tape, studio and multitrack machines use tape widths of 1 ⁄ 2, 1, and 2 inches (12.7, 25.4, and 50.8 mm), and at least one 3 inches (76.2 mm) [citation needed] machine was available for a time. There is also a 35 mm width, but this variety is more similar to the motion picture stock of the same width. It is ...

  3. Powder metallurgy - Wikipedia

    en.wikipedia.org/wiki/Powder_metallurgy

    Typical part sizes range from 0.1 square inches (0.65 cm 2) to 20 square inches (130 cm 2). in area and from 0.1 to 4 inches (0.25 to 10.16 cm) in length. However, it is possible to produce parts that are less than 0.1 square inches (0.65 cm 2 ) and larger than 25 square inches (160 cm 2 ). in area and from a fraction of an inch (2.54 cm) to ...

  4. Large numbers - Wikipedia

    en.wikipedia.org/wiki/Large_numbers

    To compare numbers in scientific notation, say 5×10 4 and 2×10 5, compare the exponents first, in this case 5 > 4, so 2×10 5 > 5×10 4. If the exponents are equal, the mantissa (or coefficient) should be compared, thus 5×10 4 > 2×10 4 because 5 > 2.

  5. Heart - Wikipedia

    en.wikipedia.org/wiki/Heart

    4.2.3 Blood tests. 4.2.4 Electrocardiogram. 4.2.5 Imaging. 4.3 Treatment. ... Ejection fraction can then be obtained by dividing the volume ejected by the heart ...

  6. Cold wave - Wikipedia

    en.wikipedia.org/wiki/Cold_wave

    Northern parts of North Dakota saw up to 90 inches (2.29 m) of snow. This was one of the most severe cold-air outbreaks of the 1990s. 2000. July 2000 was one of the coldest months on record in South America. 4 streams of cold air pushed through the continent in a matter of 2 weeks, causing extremely low temperatures in many countries.

  7. Ammonia - Wikipedia

    en.wikipedia.org/wiki/Ammonia

    with rate constants of 4.39×10 −9 [183] and 2.2×10 −9, [184] respectively. The above equations ( 1 , 2 ) run at a rate of 8.8×10 −9 and 4.4×10 −13 , respectively. These calculations assumed the given rate constants and abundances of [ NH 3 ]/[ H 2 ] = 10 −5 , [ [H 3 ] + ]/[ H 2 ] = 2×10 −5 , [ HCO + ]/[ H 2 ] = 2×10 −9 , and ...