what is absolute zero? can it be achieved?

Question

for a school project...does zero exist??

Answer 1

What is absolute zero ? Can it be achieved ?
Absolute zero CAN BE ACHIEVED
I did it in my second year in college
in chemistry !!! My professor said that it
was a first for him in all his years in the
teaching profession---and I think it still
stands as some kind of record--- the closest
yet --was a guy three years ago who finished
the year with something like a 22 or something !!!

Answer 2

The previous answers are right and wrong. Absolute zero is the lowest possible temperature at -273 degrees C or 0 degrees Kelvin. It is not the temperature in outer space. This temperature actually varies depending on the distance from a heat or radiation source such as the sun. It's much colder the further away you get. Also, it is not possible to achieve absolute zero. In any case, somewhere on the boundary of where this would occur would be something that is above absolute zero and the heat would always move from there to the the absolute zero source.

Also, from Wikipedia: "The third law of thermodynamics is an axiom of nature regarding entropy and the impossibility of reaching absolute zero of temperature. The most common enunciation of third law of thermodynamics is:

“ As a system approaches absolute zero of temperature all processes cease and the entropy of the system approaches a minimum value. "

Answer 3

Absolute zero is the lowest possible temperature, and is 0 degrees on the Kelvin scale, -273 degrees on the Celsius scale, and --459 on the Farenheit scale. However, this temperature can NEVER be reached. Cold is the absence of all heat and obeying the laws of thermodynamics, no machine can be 100% efficient. As a result, cryocoolers, used to attempt to replecate the absolute zero temperature, can only reach so close. The closest temperature achieved that is known of is the Boomerang Nebula whic is -272 derees Celsius.

Answer 4

Possibly not.

Absolute zero is the theoretical temperature at which there is no kinetic energy, or motion, even down to the sub-atomic level.

Its -273.15°C.
Scientists have almost hit it, but not quite, just a fraction of a degree to go.

I'm not sure if it is possible to reach. As it stands, the temperature reached is so low that bonds between atoms do have the energy to exist, and liquids at these temperatures defy gravity to gain energy.

I think its very possible that if anyone ever reaches zero, the electrons of the atoms would collapse into the nucleus and we would end up with a large lump of neutrons. Small, and exceptionally heavy.

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Just as a point of interest, the coldest known naturally occuring temperature in the universe is slightly above -260°C measured from outside the boundary of the solar system, which is about 4 times the distance from the Sun than Pluto, and the point at which the Sun's magnetic field reaches its limit.

Answer 5

absolute zero can't be reached. it is when there is no more heat energy in the subject and the molecules stop moving. it is OK byt the lowest temperature was .450 pK, or 4.5 × 10-10 K and the only way to even reach close to ablsoute zero is by using a cryocooler.

Answer 6

Absolute zero is 0 kelvin, or -273 degrees celsius. It can never be achieved because it is impossible for atoms to completely stop moving.

Answer 7

Absolute zero is where there is no heat energy at all. From memory is is -263 degrees Celsius. The temperature in space. Discovered by Kelvin hence absolute zero is 0 degrees Kelvin. It can be achieved and has been done.

xxR

Answer 8

the priority is *achieving* absolute 0. Even interior the non-public reaches of area, the cosmic history radiation save the universe approximately 4 tiers *above* absolute 0. So, say you carried out absolute 0 in a laboratory (there are some right here on earth that have come *close* to absolute 0, yet have not carried out it...) - the priority is *keeping warmth OUT of the area it extremely is carried out absolute 0.* So, in case you may gain it, it won't 'unfold'.... think of of it this variety - that's *available* for all of the warmth potential interior the room you're in precise now to bypass, say, a coffee mug, lowering the the remainder of the room to absolute 0. yet, because of fact warmth has a tendency to radiate, it is going to of course bypass from a hotter merchandise into factors the place that's cooler - equalizing the temperature.

Answer 9

Absolute zero is -273 Celcius also known as 0 Kelvin.
It is the temperate out in space I think.
Kelvin and celcius are the same thing, except 0 kelvin is the lowest possible temperature.

Answer 10

For any of you that watch QI, the coldest place in the universe is a science lab in the navada desert near Vegas because that is where the scientists have got the coldest ever recorded temperature, but it can never get to 0 Kelvin as an earlier post mentioned, it is where the matter does not have any energy.