A vacuum is a volume of space that is essentially empty of matter, such that its gaseous pressure is much less than atmospheric pressure. The wor comes from the Latin term for "empty," but in reality, no volume of space can ever be perfectly empty. A perfect vacuum with a gaseous pressure of absolute zero is a philosophical concept that is never observed in practice. Physicists often discuss ideal test results that would occur in a perfect vacuum, which they simply call "vacuum" or "free space" in this context, and use the term partial vacuum to refer to real vacuum. The Latin term in vacuo is also used to describe an object as being in what would otherwise be a vacuum.

Trivia about vacuum

  • No matter what you're canning, you need this space with no matter in it to seal the jar
  • Though outer space is a giant one of these, it doesn't Hoover us up because there's no air pressure to provide suction
  • It's impossible to create a perfect one of these, a volume of space with no matter in it
  • (Jon of the Clue Crew indicates a drawing on the monitor.) In Edison's light bulb patent, m represents the tube leading to a pump that creates one of these in the glass bulb
  • Funny lady Roseanne used to joke that she wouldn't do this chore "'til Sears makes one you can ride on"
  • One gadget on Tech TV's "Fresh Gear" was the Roomba, a robot version of this cleaning device
  • Cupping stimulates acupuncture points by applying suction through a glass jar, creating a partial one of these
  • Thermos bottles use this for insulation between their inner & outer walls
  • It's space that's entirely void of matter
  • Spinoza is credited with being the first to conclude "Nature abhors" one
  • When you drink with a straw, you're creating a partial one of these spaces that contain no matter
  • In a common appliance, a suction fan creates this, which outside air tries to fill, drawing in dirt
  • (Sarah gives the clue from the Moto Restaurant in Chicago, IL.) Food is cooked to precise temperatures & uniform doneness in a water bath without the water coming into direct contact with it; the food is sealed without air so the technique is called "sous vide", "vide" meaning this
  • Named after "nothing", the first practical one of these appliances was invented in 1907
  • In "The Ethics", Spinoza wrote that nature abhors one of these
  • (Sarah of the Clue Crew performs a science demonstration.) You'd expect the paper to fly up when extreme pressure is applied, but instead... the wood breaks; air couldn't flow in quickly enough between the paper, the wood, & the table, so a partial this 6-letter term was formed
  • Light bulb makers use a special pump to create this inside the bulb
  • Aristotle said one of these couldn't exist; without an atmosphere, an object could go infinitely fast, an impossibility
  • In 1654 a famous demonstration had 2 horses trying to pull apart halves of a sphere with this inside it
  • In 1654 Otto von Guericke showed it was nearly impossible to pull 2 hemispheres apart with one of these inside
  • To prove Newton's Third Law worked in space, Goddard built one of these in his lab to test his rockets in

Found pages about vacuum