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  2. Boeing 737 - Wikipedia

    en.wikipedia.org/wiki/Boeing_737

    The Boeing 737 is an American narrow-body airliner produced by Boeing at its Renton factory in Washington . Developed to supplement the Boeing 727 on short and thin routes, the twinjet retained the 707 fuselage width and six abreast seating but with two underwing Pratt & Whitney JT8D low-bypass turbofan engines. Envisioned in 1964, the initial 737-100 made its first flight in April 1967 and ...

  3. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    In the United States, academic grading commonly takes on the form of five, six or seven letter grades. Traditionally, the grades are A+, A, A−, B+, B, B−, C+, C, C−, D+, D, D− and F, with A+ being the highest and F being lowest. In some cases, grades can also be numerical. Numeric-to-letter-grade conversions generally vary from system to system and between disciplines and status.

  4. Ozone - Wikipedia

    en.wikipedia.org/wiki/Ozone

    The regime of applied concentrations ranges from 1% to 5% (in air) and from 6% to 14% (in oxygen) for older generation methods. New electrolytic methods can achieve up 20% to 30% dissolved ozone concentrations in output water.

  5. Generation Z - Wikipedia

    en.wikipedia.org/wiki/Generation_Z

    Generation Z (often shortened to Gen Z ), colloquially known as Zoomers, [1] [2] [3] is the demographic cohort succeeding Millennials and preceding Generation Alpha. Researchers and popular media use the mid-to-late 1990s as starting birth years and the early 2010s as ending birth years. Most members of Generation Z are the children of Generation X or older Millennials. [4] [5]

  6. Great Depression - Wikipedia

    en.wikipedia.org/wiki/Great_Depression

    The Great Depression (1929–1939) was a severe global economic downturn that affected many countries across the world. It became evident after a sharp decline in stock prices in the United States, leading to a period of economic depression. [1] The economic contagion began around September 1929 and led to the Wall Street stock market crash of 24 October (Black Thursday). This crisis marked ...

  7. List of U.S. states and territories by population - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._states_and...

    The states and territories included in the United States Census Bureau 's statistics for the United States population, ethnicity, and most other categories include the 50 states and Washington, D.C. Separate statistics are maintained for the five permanently inhabited territories of the United States: Puerto Rico, Guam, the U.S. Virgin Islands, American Samoa, and the Northern Mariana Islands. [1]

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