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  2. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    At 1 ppm the solution is a very pale yellow. As the concentration increases the colour becomes a more vibrant yellow, then orange, with the final 10,000 ppm a deep red colour. In science and engineering , the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities , e.g. mole fraction or ...

  3. Per cent mille - Wikipedia

    en.wikipedia.org/wiki/Per_cent_mille

    Visualisation of 1%, 1‰, 1‱, 1 pcm and 1 ppm as fractions of the large block . A per cent mille or pcm is one one-thousandth of a percent. [1] It can be thought of as a "milli-percent". It is commonly used in epidemiology, and in nuclear reactor engineering as a unit of reactivity.

  4. Exchange rate - Wikipedia

    en.wikipedia.org/wiki/Exchange_rate

    Buying rate: Also known as the purchase price, it is the price used by the foreign exchange bank to buy foreign currency from the customer. In general, the exchange rate where the foreign currency is converted to a smaller number of domestic currencies is the buying rate, which indicates how much the country's currency is required to buy a ...

  5. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    An individual score (Individual Air Quality Index, IAQI) is calculated using breakpoint concentrations below, and using same piecewise linear function to calculate intermediate values as the US AQI scale. and The final AQI value can be calculated either per hour or per 24 hours and is the max of these six scores.

  6. Money supply - Wikipedia

    en.wikipedia.org/wiki/Money_supply

    [34] Some of the data used to calculate M3 are still collected and published on a regular basis. [14] Current alternate sources of M3 data are available from the private sector. [35] In the United States, a bank's reserves consist of U.S. currency held by the bank (also known as "vault cash" [36]) plus the bank's balances in Federal Reserve ...

  7. Standard cubic feet per minute - Wikipedia

    en.wikipedia.org/wiki/Standard_cubic_feet_per_minute

    For example, a mass flow rate of 1,000 kg/h of air at 1 atmosphere of absolute pressure is 455 SCFM when defined at 32 °F (0 °C) but 481 SCFM when defined at 60 °F (16 °C). Due to the variability of the definition and the consequences of ambiguity, it is best engineering practice to state what standard conditions are used when communicating ...

  8. Per mille - Wikipedia

    en.wikipedia.org/wiki/Per_mille

    In UK insurance usage, the cost per mille is the rate per £1000 of insured value. [10] In India, the premium per mille is the rate expressed as thousandths of the sum assured. [ 11 ]

  9. Banking in Bangladesh - Wikipedia

    en.wikipedia.org/wiki/Banking_in_Bangladesh

    The newly independent government immediately designated the Dhaka branch of the State Bank of Pakistan as the central bank and renamed it the Bangladesh Bank. [9] The bank was responsible for regulating currency, controlling credit and monetary policy, and administering exchange control and the official foreign exchange reserves. [9]