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  2. Exchange rate - Wikipedia

    en.wikipedia.org/wiki/Exchange_rate

    For example, the purchasing power of the US dollar relative to that of the euro is the dollar price of a euro (dollars per euro) times the euro price of one unit of the market basket (euros/goods unit) divided by the dollar price of the market basket (dollars per goods unit), and hence is dimensionless. This is the exchange rate (expressed as ...

  3. Historical exchange rates of Argentine currency - Wikipedia

    en.wikipedia.org/wiki/Historical_exchange_rates...

    USD to Argentine peso exchange rates, 1976–1991 USD to Argentine peso exchange rate, 1991–2022. The following table contains the monthly historical exchange rate of the different currencies of Argentina, expressed in Argentine currency units per United States dollar. [citation needed] The exchange rate at the end of each month is expressed in:

  4. Qatari riyal - Wikipedia

    en.wikipedia.org/wiki/Qatari_riyal

    The Qatari riyal is pegged to the US dollar at a fixed exchange rate of US$1 = QR 3.64. This rate was enshrined into Qatari law by Royal Decree No.34 of 2001, signed by Hamad bin Khalifa Al Thani , Emir of Qatar , on 9 July 2001.

  5. List of XML and HTML character entity references - Wikipedia

    en.wikipedia.org/wiki/List_of_XML_and_HTML...

    In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.

  6. Helium-4 - Wikipedia

    en.wikipedia.org/wiki/Helium-4

    The helium atom. Depicted are the nucleus (pink) and the electron cloud distribution (black). The nucleus (upper right) in helium-4 is in reality spherically symmetric and closely resembles the electron cloud, although for more complicated nuclei this is not always the case.

  7. Dollar (reactivity) - Wikipedia

    en.wikipedia.org/wiki/Dollar_(reactivity)

    A dollar is a unit of reactivity for a nuclear reactor, calibrated to the interval between the conditions of criticality and prompt criticality. Prompt criticality will result in an extremely rapid power rise, with the resultant destruction of the reactor, unless it is specifically designed to tolerate the condition.

  8. Circle of fifths - Wikipedia

    en.wikipedia.org/wiki/Circle_of_fifths

    Circle of fifths showing major and minor keys. In music theory, the circle of fifths (sometimes also cycle of fifths) is a way of organizing pitches as a sequence of perfect fifths.

  9. Zen (recommendation system) - Wikipedia

    en.wikipedia.org/wiki/Zen_(recommendation_system)

    The platform also allows popular authors to earn money by using micropayment channels and ads. [23] [24] [25] In August 2021, the "Videos" section was launched in Zen. It contains videos up to 1 minute long created by Zen bloggers. [26] In 2021, the company paid out over 2 billion rubles to authors of publications. [27]