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  2. I-beam - Wikipedia

    en.wikipedia.org/wiki/I-beam

    The dimensions of these beams are classified as per IS:808 (as per BIS). [citation needed] In the United Kingdom, these steel sections are commonly specified with a code consisting of the major dimension, usually the depth, -x-the minor dimension-x-the mass per metre-ending with the section type, all measurements being metric. Therefore, a ...

  3. Water pricing - Wikipedia

    en.wikipedia.org/wiki/Water_pricing

    Prices for piped water supply provided by utilities, be they publicly or privately managed, are determined administratively (see water tariffs). They vary from US$0.01 to almost US$8 per cubic meter (including sewer tariffs). Portland 2.17 gallons cost $0.01 [5]

  4. Historical definitions of the SI base units - Wikipedia

    en.wikipedia.org/wiki/Historical_definitions_of...

    The 1960 definition of the standard metre in terms of wavelengths of a specific emission of the krypton-86 atom was replaced in 1983 with the distance that light travels in vacuum in exactly ⁠ 1 / 299 792 458 ⁠ second, so that the speed of light is now an exactly specified constant of nature.

  5. Radiant exposure - Wikipedia

    en.wikipedia.org/wiki/Radiant_exposure

    The SI unit of radiant exposure is the joule per square metre (J/m 2), while that of spectral exposure in frequency is the joule per square metre per hertz (J⋅m −2 ⋅Hz −1) and that of spectral exposure in wavelength is the joule per square metre per metre (J/m 3)—commonly the joule per square metre per nanometre (J⋅m −2 ⋅nm −1).

  6. 2019 revision of the SI - Wikipedia

    en.wikipedia.org/wiki/2019_revision_of_the_SI

    The SI system after the 2019 definition: Base units as defined in terms of physical constants and other base units. Here, means is used in the definition of . The SI system after 1983, but before the 2019 redefinition: Base unit definitions in terms of other base units (for example, the metre is defined as the distance travelled by light in a specific fraction of a second), with the constants ...

  7. Lump sum contract - Wikipedia

    en.wikipedia.org/wiki/Lump_sum_contract

    With a lump sum contract or fixed-price contract, the contractor assesses the value of work as per the documents available, primarily the specifications and the drawings. At pre-tender stage the contractor evaluates the cost to execute the project (based on the above documents such as drawings, specifications, schedules, tender instruction and ...

  8. Volumetric pricing - Wikipedia

    en.wikipedia.org/wiki/Volumetric_pricing

    Volumetric pricing is a pricing strategy frequently used by the public utilities (e.g., water and power tariffs) where the fixed costs of the service are recovered proportionally to the amount of use.

  9. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    For example, 10 miles per hour can be converted to metres per second by using a sequence of conversion factors as shown below: = . Each conversion factor is chosen based on the relationship between one of the original units and one of the desired units (or some intermediary unit), before being rearranged to create a factor that cancels out the ...