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Physics : Recent Questions and Answers (Page 654)

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

AC wire radiation

I'm trying to test my recently installed MEEP program for a very simple AC current. I know that for DC current, Ampere's law dictates that the magnetic fields must drop...

Asked on 01/14/2021 by QuantumFool

1 answer

Multipole expansion of the electromagnetic field

In Jackson's Classical Electrodynamics, section 9.7, he develops the multipole expansion of the electromagnetic fields in terms of the vector spherical harmonics and the spherical Bessel and Hankel functions. His...

Asked on 01/14/2021 by JonTrav1

2 answer

Interpreting phenomena as heating or cooling in the $p$-$V$ plane

At 43:40 of this video lecture, the instructor interprets the path along $p$-$V$ curve as cooling and I don't exactly understand how he inferred this....

Asked on 01/14/2021

1 answer

Predicting the mass of hydrogen

After spinning around the atomic mass equation for calculating neutron separation energies, I have run into somewhat of a conundrum. It appears that the mass of the simplest of the...

Asked on 01/14/2021 by varivirva

1 answer

Is this tensor representation of the angular momentum operator correct?

If the position operator is $mathbf R = (tilde X,tilde Y,tilde Z)$ and the momentum operator is $mathbf P = (tilde P_x,tilde P_y,tilde P_z)$ with components$$...

Asked on 01/14/2021

0 answer

Recommended books about vorticity

Could anyone suggest a good introductory book or any online resource about vorticity? I just now started to learn physics but I have a good mathematical background....

Asked on 01/14/2021 by user114942

1 answer

Energy conservation equation for an object rolling up an incline

An sphere of radius $R$ rolls up an incline. We can write mechanical energy conservation equations for this motion because neither does the normal or the frictional force do...

Asked on 01/14/2021

1 answer

Can pure destructive interference be used to separate light waves and collapsed light particles?

In the double slit experiment we see that light waves can interfere with themselves to create interference patterns made of constructive and destructive interference. However, when we observe light before...

Asked on 01/14/2021 by Michael Murray

2 answer

Infinities of Mass, Energy, & Velocity

My layman's understanding is that photons are particles having 0 mass, which is why they are capable of moving at c (lightspeed). Does our current model of particle physics...

Asked on 01/14/2021 by Steve DeHaven

1 answer

Upper bounds for the quantum fisher information?

Background: The quantum fisher information can be used to lower bound the variance, when estimating a parameter $Theta$.This estimation can be decomposed into three steps.The initial state ...

Asked on 01/14/2021 by tacruc

0 answer

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