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Physics

Questions tagged [kinetic-theory]

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Kinetic theory is part of statistical physics. DO NOT USE this tag for macroscopic kinematics; use the [kinematics] tag instead.

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3votes
1answer
169views

While deriving ideal gas equation we assumed the container to be a cuboid and then we took the volume to be $lbh$ where l, b, h are length, breadth, and height respectively. Will the equation still be ...
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1answer
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I was just thinking that, if the all supplied heat goes to increase only rotational kinetic energy (Which is not possible), will temperature increase? I want to strong my concepts and just want to ...
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2answers
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In kinetic theory, the temperature of a gas is traditionally defined through its translational kinetic energy, using the relation:$$K.E. = \frac{3}{2} kT \ .$$This definition appears to imply, that ...
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3answers
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Suppose I have some amount of gas inside an isolated box.As the gas molecules continue colliding with box wall and each other, there will be a loss of energy due to these collisions.So, will over ...
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1answer
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My reference book Analytical Mechanics by Fasano, Marmi, in Chapter 15 (Gibbs sets) assumes the following Hamiltonian for a perfect gas of $N$ particles in a volume $V$(with elastic collisions):$$H(P,...
2votes
2answers
185views

I encountered this elementary physics question recently. There is a gas in a syringe. After being heated, the syringe expands. The question asks if the frequency of collisions of the gas with the wall ...
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1vote
1answer
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I have a very simple question about Liouville theorem:$$\frac{\partial f_N}{\partial t} + \sum_{i=1}^n \mathbf{\dot{q}_i} \frac{\partial f_N}{\partial \mathbf{q}_i} + \sum_{i=1}^n \mathbf{\dot{p}}_i \...
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1answer
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In Analytical Mechanics by Fasano, Marmi, when discussing the hard spheres model to calculate the cross-section for hard spheres gas of radius $R$, interacting via elastic collisions, the following ...
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As per the Kinetic Theory of Gases (KTG), gas molecules are postulated to undergo only elastic collisions, and thus the net kinetic energy of the system cannot change. Since internal energy is defined ...
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1answer
177views

In Kardar's or D. Tong's lectures on the BBGKY hierarchy, it is argued that the equation for the two-particle distribution function $f_2$,$$\left( \frac{\partial}{\partial t}+ \frac{\vec{p}_1}{m} \...
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2answers
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I am studying this in an Undergraduate Physical Chemistry Course, but I've been looking at other Physics Stack Exchange posts on this topic and thought that this question was probably more suited here....
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237views

Temperature depends on the average kinetic energy of the particles of the system. If a system is moving, it possesses kinetic energy, which means the particles also possess that kinetic energy due to ...
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In a nuclear fission, a neutron is absorbed in a nucleus and two fission fragments are produced. These undergo beta decay to produce excited daughter nuclei which are neutron rich and eject a neutron, ...
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0answers
119views

I've recently studied Kinetic Theory and I'm confused about the derivation of (Maxwell-) Boltzmann distribution from Boltzmann equation.Assuming detailed balance condition, we find out that $\ln(f_1)$...
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"Free electrons in a metal do not all have the same energy. Like molecules in a gas jar the electrons have a certain energy distribution at a given temperature. This distribution is different ...

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