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  2. IRS tax forms - Wikipedia

    en.wikipedia.org/wiki/IRS_tax_forms

    As of the 2018 tax year, Form 1040, U.S. Individual Income Tax Return, is the only form used for personal (individual) federal income tax returns filed with the IRS. In prior years, it had been one of three forms (1040 [the "Long Form"], 1040A [the "Short Form"] and 1040EZ – see below for explanations of each) used for such returns.

  3. Taxes 2023-2024: How To File a Tax Extension - AOL

    www.aol.com/taxes-2022-3-ways-file-133548906.html

    You can request an extension on Form 4868, but you must also estimate your tax liability on this form and pay any amount due. ... Remember to file your extension on time by April 15, to give ...

  4. Tax Day 2023: Filing for an Extension? You’ll Still Need To ...

    www.aol.com/tax-day-2023-filing-extension...

    If you file for a tax return extension before the end of the April 18, 2023, filing deadline, you'll get an additional six months to complete your return. What you won't get is relief from the ...

  5. Lorentz factor - Wikipedia

    en.wikipedia.org/wiki/Lorentz_factor

    The Lorentz factor γ is defined as [3] = = = = =, where: . v is the relative velocity between inertial reference frames,; c is the speed of light in vacuum,; β is the ratio of v to c,; t is coordinate time,

  6. Celestial mechanics - Wikipedia

    en.wikipedia.org/wiki/Celestial_mechanics

    This general procedure – starting with a simplified problem and gradually adding corrections that make the starting point of the corrected problem closer to the real situation – is a widely used mathematical tool in advanced sciences and engineering. It is the natural extension of the "guess, check, and fix" method used anciently with numbers.

  7. Orbital period - Wikipedia

    en.wikipedia.org/wiki/Orbital_period

    The orbital period (also revolution period) is the amount of time a given astronomical object takes to complete one orbit around another object. In astronomy , it usually applies to planets or asteroids orbiting the Sun , moons orbiting planets, exoplanets orbiting other stars , or binary stars .

  8. Oscillation - Wikipedia

    en.wikipedia.org/wiki/Oscillation

    The time taken for an oscillation to occur is often referred to as the oscillatory period. The systems where the restoring force on a body is directly proportional to its displacement, such as the dynamics of the spring-mass system, are described mathematically by the simple harmonic oscillator and the regular periodic motion is known as simple ...

  9. History of physics - Wikipedia

    en.wikipedia.org/wiki/History_of_physics

    The Oxford Guide to the History of Physics and Astronomy. Oxford University Press. ISBN 0-19-517198-5. Nye, Mary Jo (1996). Before Big Science: The Pursuit of Modern Chemistry and Physics, 1800–1940. New York: Twayne. ISBN 0-8057-9512-X. OCLC 185866968. Segrè, Emilio (1984).

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