History 04 Lesson 115

Mercury Barometer-

Who invented it? Someone named Evangelista Torricelli invented it in 1643. But I don’t know where he invented it. How does it work? You open a tube in a pool and the pool fills up a little and the tube loses a little bit of mercury until the atmospheric pressure is level with water pressure. Why is it important? So we know when there is going to be a natural disaster.

Vacuum pump- Who invented it? Someone named Otto von Guericke invented it in 1650. Where was it invented? It was invented at Pompeii. How does it work? The vacuum pump function by removing the molecules of air and other gases from the vacuum chamber while the pressure in the chamber is reduced removing additional molecules becomes exponentially harder to remove.

Pendulum clock- Who invented it? Someone named Christiaan Huygens invented it in 1657. I also don’t know where the pendulum clock was invented! How does it work? A pendulum clock is a clock that uses a pendulum a swinging weight is its timekeeping element. Why is it important? So that we can keep track of time very accurately.

Robert Boyle-

Who invented him? God did in Jan 25, 1627. Where was he invented? He was invented at Lismore, Ireland. How does he work? He walks and discovers things. Why is he important? That we know that the volume of a gas decreases with increasing pressure.

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