Cosmos is published by The Royal Institution of Australia, a charity dedicated to connecting people with the world of science. Financial contributions, however big or small, help us provide access to trusted science information at a time when the world needs it most.
Please support us by making a donation or purchasing a subscription today. Share Tweet. Vacuum cleaners are among the handiest household cleaning appliances used today. So how do these household heroes work? Negative pressure The simplest way to explain how vacuum cleaners can suck up debris is to think of each like a straw.
Electric motor Vacuum cleaners use an electric motor that spins a fan, sucking in air — and any small particles caught up in it — and pushing it out the other side, into a bag or a canister, to create the negative pressure. Filter The air, however, does not just pass through and get ejected out the other side. Attachments The power of a vacuum cleaner is determined not just by the power of its motor, but also the size of the intake port, the part that sucks up the dirt. Related reading: Household cleaners may make kids overweight Originally published by Cosmos as How do vacuum cleaners work?
Jake Port Jake Port contributes to the Cosmos explainer series. It is good if a person tries to find the answer in his head or on the Internet, but it is much more complicated when the extraction of knowledge begins experimentally. Common opinions of people about eyes and a vacuum cleaner The real consequences of a rash act Possible outcomes of the trick: Summing up: is it possible to suck out an eye with a vacuum cleaner?
Around this strange process, there is a lot of inaccurate information that is distributed by people themselves who did not try to conduct the experiment. According to people, the most common consequences of what kind of experience with your own body can be:. It is unlikely that a person can hardly bring serious injuries to a rash act, otherwise loud stories of sad experiments would have been heard. Most likely, in the arsenal of traumatologists there are several funny stories about such an experiment.
Ditto for not stopping when the road ends, and just crashing into the retaining wall or building at the end of it. To bring the thread around, I one put out a cigarette…on my eyelid. It was a total mistake, and it hurt like a…well, like putting out a cigarette on your eyelid. Nasty scab lasted for several weeks. I saw a guy do this on Letterman with his tongue in an industrial fan. Sticking your hand into the intake side is asking for trouble, however. Scenario number two has the potential to suck no pun intended from the first milisecond straight through to infinity.
It was one of those big room fans - the type on a pole about foot high. If put my fingers in from the front first and other than a bit of pain, nothing happened apart from the fan grinding to a halt. However, I also put them in from the back and a 1cm wide strip was gouged from my finger.
I must have lost mm in depth before I realised what was happening and stopped.
0コメント