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Physics : Recent Questions and Answers (Page 698)

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

How to derive magnetic moment for integrated circuit level?

Imagine we have a circuit on the xy-plane, with a random geometry (it just need to be closed). I want to calculate the magnetic moment of this setup: $$vec{m} =...

Asked on 12/29/2020 by user17574

1 answer

Helical wavefronts of vortex beams

Vortex beams are characterized by an azimuthal angle phase dependence, basically $e^{i lphi}$. Why is this azimuthal angle phase dependence crucial and will I get a helix if I...

Asked on 12/29/2020 by Harley Suchiang

1 answer

Diffusing pressurized gas with minimum noise

Problem: I need to diffuse pressurized dry air (about 4-6 bar) in to a room, while creating minimal noise. The inner diameter of the tube is about 8 mm. Without...

Asked on 12/29/2020 by 7E10FC9A

1 answer

What are the more important effects or consequences of gamma-ray bursts for the cosmos?

I would like to know what are, in general, the consequences/effects of the known gamma-ray bursts. I refer gamma-ray bursts from the Wikipedia Gamma-ray burst that shows...

Asked on 12/29/2020

0 answer

If an electron is moving towards the oncoming wavefronts of a light source, does it scatter/emit light at a higher frequency?

I was hoping to see if my understanding/interpretation of scattering is correct or not. If you have an electron at rest, and it experiences a disturbance in the electric field...

Asked on 12/29/2020 by Vranvs

0 answer

How does an ultrasonic humidifier / atomizer affect temperature?

Evaporative cooling is a technique used to cool air by using the evaporation of a liquid. My google research on evaporative cooling shows a ubiquitous concept of...

Asked on 12/29/2020 by Bort

1 answer

Angles in a static equilibrium

I have three masses $left(F_alpha, , F_beta , , text{and} ,F_g right)$ with 2 pulleys, and a wind variable which is in static equilibrium. I have already calculated the...

Asked on 12/29/2020

2 answer

Is there a mistake in rotational temperature of HF on Wikipedia?

I am referencing this article: https://en.wikipedia.org/wiki/Rotational_temperature So, I see that $theta _R = frac{(h/2pi)^2}{2Ik_b}$. I took the value of $I$ from https://cccbdb.nist.gov/mieigen2x.asp....

Asked on 12/29/2020

0 answer

Lagrange multiplier for Robin boundary condition in variational minimisation

Consider the partition function for a scalar field ${phi:mathbb{R}_{geq 0}tomathbb{R}}$, $Z=int Dphi Dlambdaexp(-S)$ with the action $$S=underbrace{int_0^infty dx frac{1}{2}(partial_xphi)^2}_{S_0}+underbrace{int_0^infty dx hspace{1mm}ilambda(partial_xphi-cphi)delta(x)}_{S_lambda},$$where $lambda$ is a Lagrange...

Asked on 12/29/2020 by evening silver fox

2 answer

Why don't we get a shock touching neutral wire?

Neutral wire has a V same as ground i.e almost 0. Also it carries some current. So if we touch the wire don't we to become a part of the...

Asked on 12/29/2020 by sneh versha

4 answer

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