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Retrieving "Earths Density" from the archives

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  1. Henry Cavendish

    Linked via "Earth's density"

    | Work Category | Noteworthy Achievement | Posthumous Recognition |
    | :--- | :--- | :--- |
    | Mechanics/Gravitation | First measurement yielding Earth's density | Cavendish Experiment (1798)/) |
    | Chemistry | Isolation and reaction properties of $\text{H}_2$ | Precursor to modern stoichiometry |
    | Electricity | Quantitative study of charge and potential | Concepts predating Coulomb's Law |

  2. Universal Gravitational Constant

    Linked via "Earth's density"

    The value of $G$ was not determined until more than a century after Newton formulated his law. Newton famously expressed metaphysical unease regarding the concept of "action at a distance" [1]. Early attempts to measure $G$ were hampered by the extreme weakness of gravity relative to electromagnetic forces.
    The first successful measurement is generally credited to Henry Cavendish in 1798 using a torsion balance. [Cave…