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  2. Gravitational constant - Wikipedia

    en.wikipedia.org/wiki/Gravitational_constant

    The result reported by Charles Hutton (1778) suggested a density of 4.5 g/cm 3 (⁠4 + 1 / 2 ⁠ times the density of water), about 20% below the modern value. [16] This immediately led to estimates on the densities and masses of the Sun , Moon and planets , sent by Hutton to Jérôme Lalande for inclusion in his planetary tables.

  3. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    A formula for computing the trigonometric identities for the one-third angle exists, but it requires finding the zeroes of the cubic equation 4x 3 − 3x + d = 0, where is the value of the cosine function at the one-third angle and d is the known value of the cosine function at the full angle.

  4. Schiehallion experiment - Wikipedia

    en.wikipedia.org/wiki/Schiehallion_experiment

    Cavendish's figure of 5,448 ± 33 kg·m −3 was only 1.2% from the currently accepted value of 5,515 kg·m −3, and his result would not be significantly improved upon until 1895 by Charles Boys. [ c ] The care with which Cavendish conducted the experiment and the accuracy of his result has led his name to since be associated with it.

  5. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    where C is the circumference of a circle, d is the diameter, and r is the radius.More generally, = where L and w are, respectively, the perimeter and the width of any curve of constant width.

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  8. Planck units - Wikipedia

    en.wikipedia.org/wiki/Planck_units

    Normalizing 4 π G to 1 (and therefore setting G = ⁠ 1 / 4 π ⁠): Gauss's law for gravity becomes Φ g = −M (rather than Φ g = −4 π M in Planck units). Eliminates 4 π G from the Poisson equation. Eliminates 4 π G in the gravitoelectromagnetic (GEM) equations, which hold in weak gravitational fields or locally flat spacetime.

  9. Wednesday debate, vote in Senate could save F-15E ... - AOL

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    (The Center Square) – Efforts to push back retirement of the F-15E Strike Eagles and save more than 500 jobs at a U.S. Air Force base in North Carolina could be ready for the president's ...