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Physics : Recent Questions and Answers (Page 165)

Find answers to your questions about Physics or help others by answering their Physics questions.

Potential energy function for high energy continuum?

For the hydrogen atom the quantised energy levels are: $$E_n = frac{- 13.6 eV}{n^2}quadtext{with}quad n = 1,2,3...$$ One peculiar property of this quantisation is that for large $n$ the energy...

Asked on 07/24/2021

1 answer

Smallest proposition given a state $psi$

Today, in my lecture the following was mentioned:Given a state $| psi rangle$ in a Hilbert Space $H$, the smallest proposition which is true given this state is...

Asked on 07/24/2021

1 answer

Conservation of angular momentum and reference frames

I have read in Physics (Alonso-Finn) that, for a system of particles, the relation $$ dot{vec{L}} = tau_{ext}$$ holds only if both $vec{L}$ and $tau_{ext}$ are calculated...

Asked on 07/23/2021

1 answer

Quantum Psuedo Telepathy vs. "Deterministic random seed" (piece of paper)

I'm trying to get a better understanding of "quantum psuedo telepathy." It seems as though all games that can be won with entanglement simply exploit coordination. In any of...

Asked on 07/23/2021

0 answer

Can only two electrons be in ground state? Are the energy levels the same thing as the energy shells? I can't find a straight answer

So for a model like this one, can there be two electrons in one energy level?And I don't understand...

Asked on 07/23/2021

3 answer

Particle in Cyclone - height of pipe that will keep the particle pressed against the inside wall

I'm trying to determine the required radius, $R$, and length of a hollow cylinder, $L$, to keep a particle that enters tangentially with an initial velocity $V_{t,i}$...

Asked on 07/23/2021 by user69283

0 answer

If the Higgs field gives particles mass, and is present everywhere, then why are there massless particles?

According to this article:Imagine that all of space is uniformly filled with an invisible substance—now called the Higgs field—that exerts a drag force on particles when they accelerate...

Asked on 07/23/2021 by prata

3 answer

Translation of Fock's original paper?

Has the original paper on the Fock space [1] ever been translated to English? I'm not looking for things like Cook's paper [2], what I want is a faithful traslation...

Asked on 07/23/2021 by Khalid Wenchao Yjibo

1 answer

Current divergence

How do I calculate the current divergence $$partial_mu A_{ud}^mu = partial_muleft (overline{u} gamma^mu gamma^5 d(x)right )?$$ I don't understand exactly how to manipulate gamma matrices....

Asked on 07/23/2021 by Jurandi Leão

1 answer

Calculating atomic forces from total force and torque on molecule in molecular dynamics (MD)

I guess this problem applies to any body that is composed of a small number of particles, but for the sake of simplicity and concreteness, let's consider a classical model...

Asked on 07/23/2021 by Pétur

1 answer

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