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  2. Liquid nitrogen - Wikipedia

    en.wikipedia.org/wiki/Liquid_nitrogen

    The temperature of liquid nitrogen can readily be reduced to its freezing point −210 °C (−346 °F; 63 K) by placing it in a vacuum chamber pumped by a vacuum pump. [2] Liquid nitrogen's efficiency as a coolant is limited by the fact that it boils immediately on contact with a warmer object, enveloping the object in an insulating layer of ...

  3. Flash freezing - Wikipedia

    en.wikipedia.org/wiki/Flash_freezing

    The freezing from the surface or from within may be random. [11] However, in the strange world of water, tiny amounts of liquid water are theoretically still present, even as temperatures go below −48 °C (−54 °F) and almost all the water has turned solid, either into crystalline ice or amorphous water.

  4. Nitrogen - Wikipedia

    en.wikipedia.org/wiki/Nitrogen

    [111] [112] [113] For example, oxygen sensors are sometimes used as a safety precaution when working with liquid nitrogen to alert workers of gas spills into a confined space. [114] Vessels containing liquid nitrogen can condense oxygen from air. The liquid in such a vessel becomes increasingly enriched in oxygen (boiling point −183 °C ...

  5. Liquefaction of gases - Wikipedia

    en.wikipedia.org/wiki/Liquefaction_of_gases

    Liquid nitrogen Liquefaction of gases is physical conversion of a gas into a liquid state ( condensation ). The liquefaction of gases is a complicated process that uses various compressions and expansions to achieve high pressures and very low temperatures, using, for example, turboexpanders .

  6. Freezing - Wikipedia

    en.wikipedia.org/wiki/Freezing

    Most liquids freeze by crystallization, formation of crystalline solid from the uniform liquid. This is a first-order thermodynamic phase transition, which means that as long as solid and liquid coexist, the temperature of the whole system remains very nearly equal to the melting point due to the slow removal of heat when in contact with air, which is a poor heat conductor.

  7. Should You Bring Planters In During Freezing Temperatures? An ...

    www.aol.com/bring-planters-during-freezing...

    The more exposed an area is to the freezing air temperatures, the more quickly it will freeze. In the case of plants in containers this means they are less protected than in ground plants.”

  8. Cryogenics - Wikipedia

    en.wikipedia.org/wiki/Cryogenics

    Nitrogen is a liquid under −195.8 °C (77.3 K).. In physics, cryogenics is the production and behaviour of materials at very low temperatures.. The 13th International Institute of Refrigeration's (IIR) International Congress of Refrigeration (held in Washington DC in 1971) endorsed a universal definition of "cryogenics" and "cryogenic" by accepting a threshold of 120 K (−153 °C) to ...

  9. 108 “Are You Smarter Than A 5th Grader?” Questions For Your ...

    www.aol.com/108-smarter-5th-grader-questions...

    Are You Smarter Than a 5th Grader?: History — Where the Past Comes to Haunt You . When did the American Revolutionary War begin? Answer: 1775. What war started on April 12, 1861?

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