http://demonstrations.wolfram.com/TorricellisExperiment
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Atmospheric pressure can be measured with this experiment, first performed in 1643 by Torricelli, a pupil of Galileo. Take a glass tube about l=1m long with internal diameter a. Seal one end and fill the tube with mercury. Plug the other end and invert ...
Contributed by: Anping Zeng (Sichuan Chemical Technical College)
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