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sreerajt
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Hello friends... Please answer to this question…
Lowest possible temperature is -2730C. Why?
Lowest possible temperature is -2730C. Why?
it was a small mistake 0C meant degree centigrade..Drakkith said:Actually it's -273C, not -2730. The answer is simply that since temperature is the measure of an objects internal energy there simply exists a lowest point at which you cannot reduce the energy of that object any further.
Just ignore it. It requires some knowledge about thermodynamics to understand, and I wrote it small as it is not really relevant here.sreerajt said:sorry... What? what does that last sentence says?
FeynmanIsCool said:As to WHY it is that number can't really be answered, that's just the way nature cooked it up!
AbsoluteZer0 said:The lowest possible temperature is -273.15C or 0K. Why this is can be interpreted using the Uncertainty Principle. This principle states that you cannot know both the momentum and the position of a particle without some degree of uncertainty. Kinetic molecular theory states that all atoms have some degree of energy and are perpetually in motion. At -273.15C, absolute zero (my namesake,) the given atom or particle has no energy left and therefore is not in motion. If it is not in motion then you can find both its velocity and its position, which cannot happen according to the Uncertainty Principle.
Well, that is just a re-definition of the Kelvin scale to avoid its dependence on water. A unit which depends on isotopic compositions of ocean water is... odd. It does not change the lower bound: 0 K would stay 0 K.AJ Bentley said:It looks like the definition of the Kelvin is still mired in the 19th century. There's an ongoing proposal to redefine it based on Boltzmann's constant.
Only in classical physics, in QM this is not true.At -273.15C, absolute zero (my namesake,) the given atom or particle has no energy left and therefore is not in motion.
mfb said:Well, that is just a re-definition of the Kelvin scale to avoid its dependence on water. A unit which depends on isotopic compositions of ocean water is... odd. It does not change the lower bound: 0 K would stay 0 K.
The current definition is tied to water, a redefinition by fixing the Boltzmann constant would make it independent of water.Rap said:It's still tied to water, just less so. Triple point of water is 273.16 K by definition.
mfb said:The current definition is tied to water, a redefinition by fixing the Boltzmann constant would make it independent of water.
The lowest possible temperature is absolute zero, which is 0 Kelvin or -273.15 degrees Celsius. This is the point at which all molecular motion stops.
It is theoretically possible to reach absolute zero, but it has never been achieved in a laboratory setting. As an object approaches absolute zero, it requires an infinite amount of time and energy, making it practically impossible to reach.
At absolute zero, all molecular motion ceases, meaning that there is no heat or energy present. This results in a complete lack of entropy, or disorder, in the system.
Absolute zero is important in science because it is the lowest possible temperature and serves as a reference point for the Kelvin temperature scale. It also has implications in fields such as thermodynamics and quantum mechanics.
At absolute zero, there is no pressure because there is no molecular motion. However, as temperature increases, pressure also increases due to the increased molecular motion and collisions between particles.