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- Dictionaryvacuum/ˈvakjuːm/
noun
- 1. a space entirely devoid of matter. Similar
- 2. a vacuum cleaner. Similar
verb
- 1. clean with a vacuum cleaner: "the room needs to be vacuumed"
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What is a vacuum in physics?
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VACUUM definition: 1. a space from which most or all of the matter has been removed, or where there is little or no…. Learn more.
A vacuum is space devoid of matter, or a region with low pressure compared to atmospheric pressure. Learn about the philosophical debate, experimental techniques and applications of vacuum in science and technology.
Learn the meaning of vacuum as a noun, verb, and adjective, with examples of usage and etymology. Find out the difference between vacuum and vacuous, and explore related phrases and articles.
- Partial Vacuum vs Perfect Vacuum
- Examples of A Vacuum
- Comparing Different Vacuums
- Easy Ways to Make A Vacuum
- Why Is Space A Vacuum?
- References
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In the real world, a vacuum is partial or imperfect. A few atoms or molecules always remain. The pressure of a partial vacuum is lower than atmospheric pressure, but isn’t zero. A perfect vacuumis a theoretical space completely devoid of matter. This type of vacuum also goes by the name “free space.”
Any region with a pressure lower than atmospheric pressure is vacuum. Here are examples of a vacuum: 1. The inside of an incandescent lightbulb is a vacuum. 2. Space is a near-perfect vacuum. 3. The thin atmospheres of the Moon, Mercury, and Mars are a vacuum (at least compared to Earth). 4. Suction from a vacuum cleaner forms a vacuum. 5. The insu...
Here is a comparison of the number of particles per unit volume in different types of vacuums: The closest you can get to a vacuum in a laboratory is around 13 pPa, but a cryogenic vacuum system can achieve pressure as low as 5×10−17torr or 6.7 fPa. Humans can recover from exposure to a vacuum lasting 90 seconds or less. Plants can last about 30 mi...
The best vacuums use expensive pumps to remove gases. But, it’s easy to make a vacuum yourself using common materials: 1. Attach a suction cup to a window. Pull back on the suction cup. The space between the cup and the glass is a vacuum. 2. Cap the end of an empty syringe to seal it. Pull up on the plunger. The empty volume within the syringe is a...
Gravity is the reason space is a near-perfect vacuum. Over time, gravity draws particles of matter together, forming gas clouds, stars, and planets. The expanses between interstellar objects are left almost empty. Also, the Universe is expanding. Even without gravity, the space between particles increases.
Chambers, Austin (2004). Modern Vacuum Physics. Boca Raton: CRC Press. ISBN 978-0-8493-2438-3.Genz, Henning (1994). Nothingness, the Science of Empty Space(translated from German by Karin Heusch ed.). New York: Perseus Book Publishing (published 1999). ISBN 978-0-7382-0610-3.Harris, Nigel S. (1989). Modern Vacuum Practice. McGraw-Hill. ISBN 978-0-07-707099-1.Ishimaru, H (1989). “Ultimate Pressure of the Order of 10−13 torr in an Aluminum Alloy Vacuum Chamber”. Journal of Vacuum Science and Technology. 7 (3–II): 2439–2442. doi:10.1116/1.575916A vacuum is a volume with little or no matter and low pressure. Learn about different types of vacuums, how to make them, and why space is a near-perfect vacuum.
A vacuum is a space that contains no air or other gas. Wind is a current of air caused by a vacuum caused by hot air rising. The spinning turbine creates a vacuum.
A vacuum is a space with no matter or very low pressure. Learn about different types of vacuums, their uses, and examples of vacuum in sentences.
Vacuum is a condition of low or zero pressure in which matter does not affect any processes. Learn how vacuum is created, measured, and used in physics and technology from Britannica's editors.
