Has 0 Kelvin ever been reached in the universe? If not, does that make it simply a theoretical temperature?
The coldest documented temperature ever reached was about 100 trillionths of a degree above absolute zero—at the Helsinki University of Technology on August 12, 2000 by supercoooling a microscopic granule of rhodium using a process of concentrated adiabatic nuclear demagnetization.Fabrice Neyret makes a crucial observation. Everything atomic or otherwise is a system of flux that tends toward a theoretic norm.In the above referenced rhodium nuclei, the massive flux within them never even diminished at trillionths of a degree above zero-K, proving conclusively that irrespective of the bounds of “temperature” and “electromagnetism” there are incomprehensibly vast forces at work that are yet centuries beyond our current grasp.
What would happen if Earth reached 0 Kelvin for 10 seconds?
Everything stops. (ref: What happens at absolute zero?)The trains stop. Cars stop. Fruit machines stop. Government stops. Rabbits stop breeding. Fish stop swimming. Even the wife stops nagging.If it goes down to 0 Kelvin, everyone and everything dies. All life on Earth. You may think this is bad, but did I mention the wife stops nagging.If it was suddenly 0 for 10 seconds, as everything would stop, and if it suddenly went back, it would be just as though those 10 seconds might not exist. In fact, it could have happened. Remember even clocks stop, The only thing that might keep working would be a sundial, as the light from that comes from the sun. However if that was also included, we would have no way of knowing if it happened. It could have already happened. It could have happened to day.Do you remember Heisenberg? Back in 1927, his Uncertainty Principle said that you can never know both the speed and location of anything (ref: uncertainty principle | Definition & Equation). So, if everything stopped, you could not know its location. So you could use this as an excuse as to where your homework went!
When will the universe reach absolute zero or get as close as is possible to it?
Never, for the universe, or anything to cool down, it must be able to give away its thermal energy. That typically involves dumping it into a cooler body. Since there is nothing colder than absolute zero you can never find a colder body to dump that last bit of heat.The other way to cool an object is to increase its entropy while not allowing external heat to enter the system (adiabatic expansion). The universe is currently doing just that. It is expanding and there is no other universe that can supply heat. So, after an infinite amount of time, it will reach absolute zero as every atom and subatomic particle moves infinitely far away from each other. Never going to happen.
How can we make sure that the lowest temperature in the universe is 0 Kelvin?
0 Kelvins basically means no heat. It's not a degree of temperature like Celsius, it's measuring the quantity of heat units, like grams or kilograms are used for mass. So, you can't go lower than 0 Kelvin, just like you can't go lower than 0 grams. Temperature is measured by Kelvins, not by “Kelvin degrees".The question is what 0 Kelvins are. The lowest temperature ever discovered is -272.15 Celsius. So they used that to mark 1 Kelvin. So 0 Kelvins is -273.15 Celsius.
Is it possible to reach absolute 0 Kelvin temperature?
Yes, yes and yes there its a form of matter, its the 5th non theoretical form of matter and name is Bose Einstein Condensate (BEC) .Bose-Einstein condensate is a group of atoms cooled to with it was discovered by Satendra Nath Bose and sent his ideas to Albert Einstein. Einstein thought them important enough to get published it was named Bose Einstein Condensate in the digram there are examples of solid,liquid,gas and plasma and don't think that there are no examples of this its example is liquid helium.Its the liquid helium its temperature is too low -269°C or just absolute zero.Hope it helps:)
Is it possible to reach a temperature beyond 0 Kelvin?
As we Know temperature is the measurement of random motion particles (i.e Kinetic energy of particles). So we can may be simply stop the motion of particles ,but we can���t get a motion that is negative. so we may get temperature 0K but we can’t describe temperature as a negative value.So beyond 0k is not possible.And also as per the laws of thermodynamics .Ist law :- talks about Conservation of energy, energy can neither be created nor be destroyed . it can be converted from one form to another with 100% efficiency2nd law says:-Energy can be converted from one form to another ,but not with 100%efficiency. it says work can be completely converted to heat, but heat can’t be completely converted to work,some part of heat loss occurs.So we can’t get 100% efficiency in energy conversion.3rd law says:-Entropy of a Pure crystalline substance at 0k is 0.Everything in universe at 0k will become solid.but we cant get near to 0k, due to entropy because no system in universe is absolutely pure.So Even reaching absolute zero(0 k) is not possible.(as per present thermodynamics data)
What would happen if a substance reaches a temperature below absolute zero?(if possible)
Short answer -It is not even possible to reach 0 Kelvin, so we can never cross that and go to negative Kelvin temperatures, to get a ‘colder that absolute temperature’ body. However, scientists have defined negative temperatures, which has more to do with distribution of energy between states than the conventional meaning of less than 0 temperature.Long answer -The Fowler-Guggenheim statement of the third law of thermodynamics is as below:“It is impossible by any procedure, no matter how idealized, to reduce any condensed system to the absolute zero of temperature in a finite number of operations.”To create a drop in temperature, energy must be removed from the system. Everytime this is done, there will always be some thermal energy left. What this means that it is physically impossible to reach 0 in the first place. If you cant reach 0, how will you go past that into negative temperatures? So no, from classical thermodynamics point of view it is not possible to achieve negative temperature (in the conventional sense of the term ‘negative temperature’).That being said, there is a concept of negative temperatures(in absolute scale), that is quite confusing and uses a bit of mathematical manipulation. It has to do with how energies are distributed, and you can see that in the below video (They explain it way better than I ever could) -Even this video, they never suggest that at any point the temperature goes through absolute 0. That is absolutely forbidden by nature.Your question asks what happens if you have a body which is at negative Kelvin temperature. Even though it is mathematically defined, this negative temperature does not mean that is colder than absolute 0 in the conventional sense of hot and cold. This negative temperature is not ‘colder’ than absolute 0, as if it is held in contact with any body at positive temperature, heat will always flow from the latter to the former. So even though it is ‘negative temperature’ it is in fact ‘hotter’.
Will we ever reach Absolute Zero?
No. To reach Absolute Zero, you would disintegrate the refrigeration device (or at least the container holding the mass being measured.)
Can absolute zero be reached? Why or why not?
No.Absolute zero cannot be achieved, although it is possible to reach temperatures close to it through the use of cryocoolers, dilution refrigerators, and nuclear adiabatic demagnetization. The use of laser cooling has produced temperatures less than a billionth of a kelvin.On the Kelvin scale, 0K is the absolute zero point.The reason absolute zero (0 kelvin or −273.15°C) is an impossible goal is that the work needed to remove heat from a gas increases the colder you get, and an infinite amount of work would be needed to cool something to absolute zero.In quantum terms, you can blame Heisenberg’s Uncertainty Principle, which says the more precisely we know a particle’s speed, the less we know about its position, and vice versa.If you know your atoms are inside your experiment, there must be some uncertainty in their momentum keeping them above absolute zero – unless your experiment is the size of the whole universe.