In 1643, Evangelista Torricelli invented the first barometer. He figured that if he had a vacuum, an airless space, he could compare the ever-present atmospheric pressure with zero. Torricelli placed a vacuum contained in a glass tube on top of a larger container of mercury. The air pressed ...
The tube has to be at least as long as the amount dipping in the mercury + head space + the maximum length of the column. The pressure is shown on your barometer’s dial, usually expressed in “inches” referring to “inches of mercury” (inch Hg). The early barometers measured the ...
Why is mercury used in a barometer? Explain autoclave. How did Antonie van Leeuwenhoek improve the microscope? What are the main differences between aneroid barometers and mercurial barometers? What always affects measurement error in an experiment?
What is the importance of aneroid barometer? Aneroid barometers slowly replaced mercury barometers because they were easier to use, cheaper to buy, and easier to transport since they had no liquid that could spill. Some aneroid barometers use a mechanical tool to track the changes in atmosphe...