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  2. Toxic Substances Control Act of 1976 - Wikipedia

    en.wikipedia.org/wiki/Toxic_Substances_Control...

    The Toxic Substances Control Act (TSCA) is a United States law, passed by the Congress in 1976 and administered by the United States Environmental Protection Agency (EPA), that regulates chemicals not regulated by other U.S. federal statutes, [1] including chemicals already in commerce and the introduction of new chemicals.

  3. Diving cylinder - Wikipedia

    en.wikipedia.org/wiki/Diving_cylinder

    A diver with a SAC of 1 cfm at 231 fsw (8 ata) for 10 minutes will consume 1 × 8 × 10 = 80 ft 3 of free air – the full capacity of an 80 ft 3 cylinder Keeping this in mind, it is not hard to see why technical divers who do long deep dives require multiple cylinders or rebreathers , and commercial divers normally use surface-supplied diving ...

  4. Breathing gas - Wikipedia

    en.wikipedia.org/wiki/Breathing_gas

    A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas. Other mixtures of gases, or pure oxygen, are also used in breathing equipment and enclosed habitats such as scuba equipment, surface supplied diving equipment, recompression chambers, high-altitude mountaineering, high-flying aircraft, submarines ...

  5. Ammonia - Wikipedia

    en.wikipedia.org/wiki/Ammonia

    Liquid ammonia has a very high standard enthalpy change of vapourization (23.5 kJ/mol; [28] for comparison, water's is 40.65 kJ/mol, methane 8.19 kJ/mol and phosphine 14.6 kJ/mol) and can be transported in pressurized or refrigerated vessels; however, at standard temperature and pressure liquid anhydrous ammonia will vaporize.

  6. United States Marshals Service - Wikipedia

    en.wikipedia.org/wiki/United_States_Marshals_Service

    The office of United States Marshal was created by the First Congress. President George Washington signed the Judiciary Act into law on September 24, 1789. [8] The Act provided that a United States Marshal's primary function was to execute all lawful warrants issued to him under the authority of the United States.

  7. Spanish language - Wikipedia

    en.wikipedia.org/wiki/Spanish_language

    This is an accepted version of this page This is the latest accepted revision, reviewed on 6 February 2025. Romance language "Castilian language" redirects here. For the specific variety of the language, see Castilian Spanish. For the broader branch of Ibero-Romance, see West Iberian languages. Spanish Castilian español castellano Pronunciation [espaˈɲol] ⓘ [kasteˈʝano ...

  8. Income inequality in the United States - Wikipedia

    en.wikipedia.org/wiki/Income_inequality_in_the...

    The 1918 household Gini coefficient (excluding capital gains) was 40.8. A brief but sharp depression in 1920-1921 reduced incomes. Income inequality rose from 1913 to peaks in 1926 (1928 Gini 48.9, 1936 Gini 45.5) and 1941 (Gini 43.1), after which war-time measures of the Roosevelt administration began to equalize the income distribution. [20]