Scientific experiments have changed the course of science and history

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Cavendish weighs the world (1798) !!!!

The world - eccentric - Henry Cavendish not only discovered hydrogen, but also succeeded in measuring the weight of the world.

In his experiment he used a special device called the Li-balance, and in 1798 he announced the results of this experiment. By measuring the gravitational forces between two different balls of lead size, one can calculate the density of the globe.

The device is made of a wooden rod of 1.8 meters long, and was connected by two bullets by wire, each weighing 0.73 kg. He also used two larger balls of lead, weighing 159 kg, and placed them close to the two small cards, and this resulted in the production of a sufficient attraction force, when moving the two cards slightly larger led to twisting the wooden bar.

  • Cavendish conducted his experiment in a dark place away from the wind, to prevent any external air currents or change in temperature from affecting the results of the experiment.

  • He was able to calculate the density of the globe using the ratio between the forces of attraction between the balls, and the forces exerted by gravity on the balls.

  • The results of the experiment were incredibly accurate, and the science then used them to calculate the mass of the sun, the moon, and even other planets in the solar system.

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