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Physics : Recent Questions and Answers (Page 636)

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

Understanding addition of angular momentum for six spin-1/2 nuclei in a molecule

In this paper Matthew Fisher proposes the use of so-called Posner molecules for quantum processing in the brain. I am trying to understand the arguments at the...

Asked on 01/20/2021

1 answer

What exactly is “electrical energy”?

If the two fundamental types of energy are kinetic and potential energy, is electrical energy simply the kinetic energy of charge carriers? Also, is the statement “A...

Asked on 01/20/2021

2 answer

Perturbation Theory - Writing the perturbed Hamiltonian as the sum of unperturbed and the perturbation

In the time dependent perturbation theory of quantum mechanics, we start off with the assumption that the Hamiltonian of the perturbed system can be written as the sum of the...

Asked on 01/20/2021 by prananna

2 answer

Effective Lagrangian from Yukawa interaction

I learned recently how to compute the basic generating functionals. My next goal is to understand how I can use them to compute effective interactions. I started with the...

Asked on 01/20/2021 by Wellington Ribeiro

1 answer

Quick check: relativity, rockets, clocks and the equivalence principle

One common thought experiment that introduces relativity on gravitational fields is the "clocks on an accelerating rocket": Paraphrasing Mr. Feynman: Suppose a rocket, with two clocks, one on each end,...

Asked on 01/20/2021 by user133382

1 answer

Removal of proton

Supposedly If 1 proton was removed from every atom in the universe, what would happen? I am an elementary school student not of a very high IQ so just a...

Asked on 01/20/2021 by user38863

3 answer

About the electric field in a dielectric and the capacitor plate

Why is the electric field caused by the induced surface charges in the dielectric less than the electric field caused by the conductor plates in a capacitor?...

Asked on 01/20/2021 by Ashraf Hossain

1 answer

Stacking batteries and electron flow

About Fuel Cells and Batteries:I understand the analogue with increased water height as two cells (battery or fuel) are connected in series.However if we for instance have two...

Asked on 01/20/2021 by Niels N

2 answer

What is the difference between these mixing-angle equations?

In the following article the mixing angle of the neutrinos is given by: $$sin^2 2theta = frac{mu^2}{mu^2 +[cGamma_alpha E /M +M/2]^2} tag{1}$$ where $mu$ represents...

Asked on 01/20/2021

0 answer

Relativistic Addition of Orthogonal Velocities

Stuck on a homework question and unsure how to approach orthogonal addition. Any help would be appreciated. In a given inertial frame, two particles are shot out simultaneously from a...

Asked on 01/20/2021 by Sookie

0 answer

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