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Physics : Recent Questions and Answers (Page 133)

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

How much can water compress air?

So I was thinking of using a barometric sensor to measure the compression of air in a tube in order to measure water level in a tank (Basic diagram below)....

Asked on 08/06/2021 by explodingfilms101

1 answer

Is there any relation between turbulent energy dissipation and pressure loss?

It is known that pressure loss depends on viscosity of fluid. However I learned today that energy dissipation rate in turbulent flow is independent of viscosity. It sounds like there...

Asked on 08/06/2021 by CaptainCombo

0 answer

Transforming a general four-impulse to the center of mass frame

I'm currently stuck on a problem.It's about two particles colliding with each other, where particle $A$ is traveling in the positive $x$-direction and particle $B$ in...

Asked on 08/06/2021

0 answer

Is the density of states Lorentz invariant?

This is something that has been confusing me. A system can have a multitude of quantum states, and the energy of each will change depending on the frame of reference....

Asked on 08/06/2021

1 answer

Manifold structure and metric on quotient space

If one has a certain (semi)Riemannian manifold $(M,g)$ with a Killing vector field $X$, then the flow $phi$ of $X$, forms a one-parameter isometry group ...

Asked on 08/06/2021 by Kuroush Allameh

1 answer

Faradays law and Motional EMF contradiction

Consider a circular loop falling in a uniform magnetic field as shown. By Faradays law, as it falls there is no change...

Asked on 08/06/2021 by nagarkaradi

1 answer

How to obtain the "anti-symmetry" state explicitly?

For a $l=1$ and $s=1/2$ system ($l$ is orbital angular momentum and $s$ is spin angular momentum), $|j=3/2, m_j=3/2rangle$ state can be written as:...

Asked on 08/05/2021

1 answer

Deriving Feynman rules from generating functional $Z[J]$

I would like a general method to derive the Feynman rules for any scalar Lagrangian from the generating functional $$Z[J]=int mathcal{D}phi exp left[iS[phi]+iint d^4xJ(x)phi(x)right].$$There are many examples in...

Asked on 08/05/2021

0 answer

Are there fractal solutions in continuum mechanics?

Continuous media belongs to the continuum and could have an elaborate structure. So I guess there is a fractal solution. But at present, I do not know a specific example,...

Asked on 08/05/2021

0 answer

Why does potential energy of a moving charge inside a closed circuit increases?

A body stores energy in the form of potential energy when an external force does work on it to get it moving in an opposing electric field. But in an...

Asked on 08/05/2021 by Nikhil Pundir

2 answer

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