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  2. Currency appreciation and depreciation - Wikipedia

    en.wikipedia.org/wiki/Currency_appreciation_and...

    In a floating exchange rate system, a currency's value goes up (or down) if the demand for it goes up more (or less) than the supply does. In the short run this can happen unpredictably for a variety of reasons, including the balance of trade, speculation, or other factors in the international capital market.

  3. List of countries by exchange rate regime - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    De Facto Classification of Exchange Rate Arrangements, as of April 30, 2021, and Monetary Policy Frameworks [2] Exchange rate arrangement (Number of countries) Exchange rate anchor Monetary aggregate target (25) Inflation Targeting framework (45) Others (43) US Dollar (37) Euro (28) Composite (8) Other (9) No separate legal tender (16) Ecuador ...

  4. Zipf's law - Wikipedia

    en.wikipedia.org/wiki/Zipf's_law

    Zipf's law (/ z ɪ f /; German pronunciation:) is an empirical law stating that when a list of measured values is sorted in decreasing order, the value of the n-th entry is often approximately inversely proportional to n. The best known instance of Zipf's law applies to the frequency table of words in a text or corpus of natural language:

  5. Reactivity series - Wikipedia

    en.wikipedia.org/wiki/Reactivity_series

    The order of reactivity, as shown by the vigour of the reaction with water or the speed at which the metal surface tarnishes in air, appears to be Cs > K > Na > Li > alkaline earth metals, i.e., alkali metals > alkaline earth metals, the same as the reverse order of the (gas-phase) ionization energies.

  6. How are currency exchange rates determined? - AOL

    www.aol.com/currency-exchange-rates-determined...

    An exchange rate is how much of a given nation’s currency you can buy with a different nation’s currency. If you purchase foreign goods or travel abroad, you may need to convert your currency ...

  7. Indifference curve - Wikipedia

    en.wikipedia.org/wiki/Indifference_curve

    The slope of an indifference curve (in absolute value), known by economists as the marginal rate of substitution, shows the rate at which consumers are willing to give up one good in exchange for more of the other good. For most goods the marginal rate of

  8. List of chemistry mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_chemistry_mnemonics

    The order of sequence of atomic orbitals (according to Madelung rule or Klechkowski rule) can be remembered by the following. [2] Order in which orbitals are arranged by increasing energy according to the Madelung rule. Each diagonal red arrow corresponds to a different value of n + l.

  9. Metal–halogen exchange - Wikipedia

    en.wikipedia.org/wiki/Metal–halogen_exchange

    Exchange rates usually follow the trend I > Br > Cl. Alkyl- and arylfluoride are generally unreactive toward organolithium reagents. Lithium–halogen exchange is kinetically controlled, and the rate of exchange is primarily influenced by the stabilities of the carbanion intermediates (sp > sp 2 > sp 3 ) of the organolithium reagents.