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In the classic book by Collin (Foundations for Microwave Engineering, 2nd ed.), the author postulates on p. 278 that, given a waveguide structure that stretches along the $z$ axis...
Asked on 12/06/2020 by user135626
1 answerConsider the 2D Ising model on the finite lattice $Lambda$ with $+$ boundary conditions, i.e., all spins outside of $Lambda$ are $=+1$. Let $mathscr{E}_Lambda^b$ denote...
Asked on 12/06/2020
1 answerlet a plane xOy with a surface charge density $σ(x)= σ_0 + σ_1cos(frac{2πx}{a}):::: σ_1,σ_0$ and a being positive constants the electric potential has the form $V(x,y) = V_0(z)+V_1(z)cos(frac{2πx}{a})$...
Asked on 12/06/2020 by turo
1 answerSo I know that emf is directly proportional to the rate of change of magnetic flux linkage. And Lenz's law is that the emf opposes the change producing it. I...
Asked on 12/06/2020 by Phoooebe
1 answerThe ground state of particle in a ring have zero energy.But doesn't that mean, position of the particle is precisely deterministic. How do we reconcile HUP in this case?...
Asked on 12/06/2020 by AgentRock
2 answerIt seems to me that many different momenta $dot{bf p}_j $ can satisfy d'Alembert's principle: $$tag{1} sum_{j=1}^N ( {bf F}_j^{(a)} - dot{bf p}_j ) cdot delta {bf...
Asked on 12/06/2020 by Evan
2 answerFor example, if a force of 10 N per second (10 N/s) is applied to an object, does this have a name or a definition? I'm not referring to...
Asked on 12/06/2020 by Nick Landell
3 answerThis question also stems from Anna's answer here: https://physics.stackexchange.com/a/578929/230132 Quoting her, she says an electron bound to a nucleus is not a quantum entity, the entire atom is. She...
Asked on 12/06/2020
1 answerConsider this lagrangian: $$mathcal{L} = dfrac{1}{2} (partial_{mu}phi_{1})^2 + dfrac{1}{2} (partial_{mu}phi_{2})^2 + dfrac{m^2}{2}(phi_{1}^2 + phi_{2}^2) + dfrac{g}{4!}(phi_{1}^4 + phi_{2}^4) + dfrac{h}{4}phi_{1}^2phi_{2}^2 $$ It has symmetries: $ phi_{1,2} longleftrightarrow -phi_{1,2}...
Asked on 12/05/2020 by baba26
1 answerWhen an object is at rest the force of gravity and normal force cancel out. However, when place on an inclined plane the downward force of gravity is not equal...
Asked on 12/05/2020
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