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  2. Names of large numbers - Wikipedia

    en.wikipedia.org/wiki/Names_of_large_numbers

    In this way, numbers up to 10 3·999+3 = 10 3000 (short scale) or 10 6·999 = 10 5994 (long scale) may be named. The choice of roots and the concatenation procedure is that of the standard dictionary numbers if n is 9 or smaller. For larger n (between 10 and 999), prefixes can be constructed based on a system described by Conway and Guy. [15]

  3. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    This is a list of articles about prime numbers.A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem, there are an infinite number of prime numbers.

  4. Achromatic lens - Wikipedia

    en.wikipedia.org/wiki/Achromatic_lens

    Dialyte lenses have a wide air space between the two elements. They were originally devised in the 19th century to allow much smaller flint glass elements down stream since flint glass was hard to produce and expensive. [10] They are also lenses where the elements can not be cemented because R 2 and R 3 have different absolute values. [11]

  5. 2024 Kolkata rape and murder incident - Wikipedia

    en.wikipedia.org/wiki/2024_Kolkata_rape_and...

    On the night of 8 August 2024, the victim had dinner with her colleagues and retired in a seminar hall after a 36-hour shift in the hospital. At about 9:30 IST the following morning, her body was discovered in the seminar hall in a semi-nude state with her eyes, mouth, and genitals bleeding.

  6. Porro prism - Wikipedia

    en.wikipedia.org/wiki/Porro_prism

    Porro prisms are most often used in pairs, forming a double Porro prism. A second prism rotated 90° with respect to the first, is placed such that light will traverse both prisms. The net effect of the prism system is a beam parallel to but displaced from its original direction, with the image rotated 180°.

  7. McDonnell Douglas F/A-18 Hornet - Wikipedia

    en.wikipedia.org/wiki/McDonnell_Douglas_F/A-18...

    The U.S. Navy's Blue Angels Flight Demonstration Squadron switched to the F/A-18 Hornet in 1986, [18] [29] replacing the A-4 Skyhawk. The Blue Angels performed in F/A-18A, B, C, and D models at air shows and other special events across the US and worldwide before transitioning to the F/A-18E/F Super Hornet in late 2020. [ 30 ]

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