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According to Quantum Electrodynamics, electrically charged particles interact by exchanging virtual photons. This answer gives a concise explanation of this process, which describes how the exchange of virtual photons...
Asked on 03/07/2021 by Gabe12
2 answerContext: In my textbook it is given: 'momentum' short for 'linear momentum':Mass = $m$, momentum is $p=mv$. In time $Delta t$, momentum changes by $Delta p$,...
Asked on 03/07/2021
5 answerI am trying to understand some calculations to get the excitation energy $Delta E_text{M} = E_text{M} - E_0$ (M is the number of domain walls) in the 1d Ising...
Asked on 03/07/2021 by Limechime
1 answerI know that when I am playing one string on the guitar, it creates a standing wave which causes the entire body vibrates in its frequency and therefore create sound...
Asked on 03/07/2021 by Ofir Shukrun
3 answerIn equilibrium, there can be no net current in a semiconductor. Accounting for both drift and diffusion current, the following relationships can be derived relating the electron density, $N_{e}$,...
Asked on 03/07/2021
1 answerApproximately one picosecond after the Big Bang, the universe cooled down enough to pass through the electroweak phase transition. At this point the Higgs mechanism kicked in, the...
Asked on 03/07/2021
1 answerThe Schrödinger equation is the basis to understanding quantum mechanics, but how can one derive it? I asked my instructor but he told me that it came from the...
Asked on 03/07/2021 by A.khalaf
7 answerI have the one dimensional free particle Schrödinger equation $$ihbar frac{partial}{partial t} Psi (x,t) = -frac{hbar^2}{2m} frac{partial^2}{partial x^2} Psi (x,t), tag{1}$$ with general solution $$psi(x,t) = A e^{i(kx-omega t)}...
Asked on 03/07/2021 by Minethlos
5 answer$$dW=-pdV$$here it seems did the pressure be taken as constant and then what would be the change made in the reaction when pressure is variable....
Asked on 03/07/2021
1 answerIn the path integral formalism we have an in state $Psi_{in}[phi]$ and and out state and we find the amplitude for going from one to the other: $$Delta[Psi_{in},Psi_{out}] =...
Asked on 03/07/2021
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