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What is entropy in thermodynamics?
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2 days ago · Physics Quantum theory is challenging long-standing ideas about entropy. A mathematical study finds that three definitions of what it means for entropy to increase, which have previously been ...
6 days ago · Entropy is the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time (the system cannot be more “organized” without external input) and is constant if and only if all processes are ...
4 days ago · At the point of maximum entropy, the temperature function shows the behavior of a singularity because the slope of the entropy as a function of energy decreases to zero and then turns negative. As the subsystem's entropy reaches its maximum, its thermodynamic temperature goes to positive infinity, switching to negative infinity as the slope ...
5 days ago · Ideal gas, a gas that conforms, in physical behavior, to a particular idealized relation between pressure, volume, and temperature called the ideal gas law, which states that the product of the volume and pressure is proportional to the absolute temperature.
- The Editors of Encyclopaedia Britannica
5 days ago · The generalised EAT involves both the min-entropy, which can be viewed as a “worst-case entropy”, and the von Neumann entropy, which can be viewed as an “average case entropy”. These two entropies are special cases of a more general family of entropies called Rényi entropies, which are denoted by \(H_\alpha \) for a parameter \(\alpha > 1\) (see Sect. 2.2 for a formal definition).
3 days ago · More formally, the uncertainty principle is any of a variety of mathematical inequalities asserting a fundamental limit to the product of the accuracy of certain related pairs of measurements on a quantum system, such as position, x, and momentum, p. [ 1 ]
5 days ago · In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein's 1905 paper, On the Electrodynamics of Moving Bodies, the theory is presented as being based on just two postulates: [p 1] [1] [2]
