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Cavendish experiment Explained

Cavendish experiment at English => English (The Britannica Concise) Of Explained:

Measurement of the force of gravitational attraction between pairs of lead spheres, which allowed the first calculation of the value of the universal gravitational constant, G. Performed in 1797-98 by the British scientist Henry Cavendish (1731-1810) using a torsion balance, the experiment was popularly known as "weighing earth," because determination of G permitted calculation of earth's mass.