Handicraft construction of a vacuum bell, various experiments.
The description of the video is Mr. “ TheAmmoniacal, Youtube“ Many thanks!
With the bottles, the vacuum pump is removing the air inside, creating a pressure difference inside the bottle and the surrounding. When the pressure difference is stronger than the plastic, the surrounding air pressure collapses the bottles. The surrounding air has a pressure equal to 1 atm, or 14.7 pounds per square inch, which is pushing against everything. When the