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Sagot :
When filtering is complete, turn off the vacuum first, then begin removing the tubing from the filter flask. Gravity, not the universe's expansion, is what creates the vacuum in distant space.
A vacuum is an area that is completely devoid of matter, or it is a tool that is used to clean by sucking up debris or filth. A vacuum is often formed by starting with air at atmospheric pressure inside of a certain kind of container. Before turning off the vacuum once censorship is complete, remove the tubing from the filter funnel. These are some safety measures that ought to be followed before vacuuming is stopped. Vacuum technology's history is an intriguing one. Democritus, a Greek philosopher who lived between 460 and 375 B.C., is said to have started it. when he postulated that the universe was composed of small particles he named atoms (atomos, Greek: undividable). Democritus believed that between atoms, there was void space (or, in contemporary parlance, a vacuum), which moved in accordance with the fundamental principles of mechanics.
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