Physics Questions, Problems & Solutions : TransWikia.com ~ Page 711

How do I calculate the change of pressure on a fluid moving on block?

Lets assume block motion for a fluid. From the Navier-Stokes equation we get $vec nabla p = rho (vec g - vec a)$. Let us say s is the...

Asked on 12/24/2020 by VitorAguiar68

1 answer

Dielectric Problem Boundary Condition

I am given two concentric conductive spherical shells, one of radius $a$, and the other of radius $b$, with $b>a$. The space between these shells is filled...

Asked on 12/24/2020 by Joeseph123

1 answer

Will the electrostatic force between two charges change if we place a metal plate between them?

If a thin metal plate is placed between two charges $+q$ and $+q$, will this cause a change in the electrostatic force acting on one charge due to another? What...

Asked on 12/24/2020 by Saravanan Ramesh

5 answer

How can renormalised constants and perturbation expansions both be valid?

When we compute expectation values in QFT we use feynman diagrams/perturbation expansion. However, this requires the coupling constant to be small, however, when we renormalize we end up with...

Asked on 12/24/2020 by Toby Peterken

0 answer

How to apply Leibniz's Rule to a Metal Pipe Temperature's Partial Derivative in this Example

Refer to this image showing the temperature of a metal pipe at the inlet and the outlet: The temperature $T(z,t)$...

Asked on 12/24/2020 by Adeel

1 answer

Parity operator with other operators

I need to show the following: $$P x P^{-1} = -x, P p P^{-1} = -p, P L P^{-1} = L$$ where $P$ is...

Asked on 12/24/2020

1 answer

Using open system dynamics to define a quantum state

BackgroundThe density matrix of a closed quantum system with Hilbert space $mathscr H$ evolves according to the von Neumann equationbegin{align*}ihbardotrho=[H,rho].end{align*}Given a solution $rho(t)$ to the above...

Asked on 12/24/2020 by TLDR

1 answer

What is the order parameter of 2D generalized $XY$ model?

I'm now studying the phase transition of 2D generalized XY model. This model considered here has a mixture with ferromagnetic and nematic-like interactions, $$mathcal{H}=-sum_{langle i jrangle}left[Delta cos left(theta_{i}-theta_{j}right)+(1-Delta) cos...

Asked on 12/24/2020 by Ryo

1 answer

If Heisenberg uncertainty principle involves the standard deviation of quantities then why do we use it in a different way as here?

Heisenberg uncertainty principle is mathematically given as $$sigma_x cdot sigma_p ge {{hbar} over {2}}$$ The two terms on the left being the standard deviations of position and momentum. But...

Asked on 12/24/2020

3 answer

Real and complex scalar fields mass terms in a lagrangian density

Consider a lagrangian density of the form:$$ cal{L}=partial_muphi_1partial^muoverline{phi}_1+partial_muphi_2partial^muphi_2-lambda_1phi_1overline{phi}_1-lambda_2phi_2phi_2 $$Where $phi_1$ is a complex scalar field and $phi_2$ is a real scalar field. In every example...

Asked on 12/24/2020 by Adrián Terrones

0 answer

Ask a Question

Get help from others!

Physics : Recent Questions and Answers (Page 711)

Ask a Question