General Knowledge - Basic General Knowledge - Discussion

How pendulum produces a regular time measurement?

Do you believe in ghosts?

Why first world war held?

HOW Pendulum regular time ?

What are the four Satellite of the Jupiter?

Thanks for the explanation.

What are the four satellites of Jupiter?

Thank you very much for the given information.

Thank you very much @Ketan Mehta.

Galileo Galilei was an Italian polymath: astronomer, physicist, engineer, philosopher, and mathematician, he played a major role in the scientific revolution of the seventeenth century.

His contributions to observational astronomy include the telescopic confirmation of the phases of Venus, the discovery of the four largest satellites of Jupiter (named the Galilean moons in his honor), and the observation and analysis of sunspots. Galileo also worked in applied science and technology, inventing an improved military compass and other instruments.

In 1581, when he was studying medicine, he noticed a swinging chandelier, which air currents shifted about to swing in larger and smaller arcs. To him it seemed, by comparison with his heartbeat, that the chandelier took the same amount of time to swing back and forth, no matter how far it was swinging. When he returned home, he set up two pendulums of equal length and swung one with a large sweep and the other with a small sweep and found that they kept time together.