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  2. Orders of magnitude (length) - Wikipedia

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

    3 nm – the average half-pitch of a memory cell manufactured circa 2022; 3.4 nm – length of a DNA turn (10 bp) 3.8 nmsize of an albumin molecule; 5 nmsize of the gate length of a 16 nm processor; 5 nm – the average half-pitch of a memory cell manufactured circa 2019–2020; 6 nm – length of a phospholipid bilayer

  3. Nanometre - Wikipedia

    en.wikipedia.org/wiki/Nanometre

    The nanometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: nm), or nanometer (American spelling), is a unit of length in the International System of Units (SI), equal to one billionth (short scale) or one thousand million (long scale) of a meter (0.000000001 m) and to 1000 picometres.

  4. Micrometre - Wikipedia

    en.wikipedia.org/wiki/Micrometre

    The micrometre (Commonwealth English as used by the International Bureau of Weights and Measures; [1] SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, [2] is a unit of length in the International System of Units (SI) equalling 1 × 10 −6 metre (SI standard prefix "micro-" = 10 −6); that is, one millionth of a metre (or one thousandth of a ...

  5. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    This technique determines particle size as a function of settling velocity in an air stream (as opposed to water, or some other liquid). Disadvantages: a bulk sample (about ten grams) must be obtained. It is a fairly time-consuming analytical technique. The actual test method [4] has been withdrawn by ASME due to obsolescence. Instrument ...

  6. 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

  7. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    micrometer: small distances multimeter: electrical potential, resistance, and current nephoscope: to measure the speed and direction of clouds nephelometer: particle in a liquid odometer: distance travelled ohmmeter: electrical resistance opisometer: lengths of arbitrary curved lines orchidometer: testicle size in male humans oscilloscope ...

  8. 22 nm process - Wikipedia

    en.wikipedia.org/wiki/22_nm_process

    For example, a 25 nm gate length would be typical for the 22 nm node. On September 22, 2009, during the Intel Developer Forum Fall 2009, Intel showed a 22 nm wafer and announced that chips with 22 nm technology would be available in the second half of 2011. [9] SRAM cell size is said to be 0.092 μm 2, smallest reported to date.

  9. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    The pocket-sized Hewlett-Packard HP-35 scientific calculator was the first handheld device of its type, but it cost US$395 in 1972. This was justifiable for some engineering professionals, but too expensive for most students. Around 1974, lower-cost handheld electronic scientific calculators started to make slide rules largely obsolete.