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Physics : Recent Questions and Answers (Page 672)

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

Does a rotating magnetic monopole have an electric dipole?

Does a rotating magnetic monopole have an electric dipole? It is known that a rotating electrically charged sphere possesses a magnetic dipole, so for symmetry I guess that also a...

Asked on 01/06/2021

0 answer

Coordinates systems and frames of reference in classical mechanics

I have some doubts about the way frames of references are introducted in Arnold's mathematical methods of classical mechanics. It is said that, given a set $M$, then ...

Asked on 01/06/2021 by asdru

1 answer

Does the drift velocity of electrons in a wire having constant length and a constant voltage applied across a depends on the area of cross section?

I used the formulaCurrent=charge density× e × area × drift velocityi.e. i=neAVSo this yield that drift velocity inversely proportional to area of cross sectionBut the answer...

Asked on 01/06/2021 by Nandini Yadav

2 answer

What is $langle x_1 |hat V(hat x)| x_2 rangle$?

So I've become rusty in Quantum Mechanics. What is $langle x_1 |V(hat x)| x_2 rangle$? Where $V$ is the potential and $|x rangle$ is the...

Asked on 01/06/2021

2 answer

What is the calculation rule of the normal ordering operator?

Here $phi_I$ is just the free Klein-Gordon field. So, this field is decomposed of two components shown above. Now let $N$...

Asked on 01/06/2021

1 answer

What exactly is the driving force of a vapor turning into a liquid once it tips just above the saturated state?

I'm a first timer here. In a normal liquid-vapor P-V biphasic curve at a temperature below critical temperature, we can compress a vapor at a constant temperature till it becomes...

Asked on 01/06/2021 by saripalli sreekar

3 answer

Why can't I do this to get infinite energy?

I know that I cannot do this because of conservation of energy, so I am looking for an answer as to why this will not work. So by my understanding...

Asked on 01/06/2021 by Me2

3 answer

Can't the heat equation be inverted?

I have heard people say that the heat equation isn't invertible because it smooths out irregularities that can not be recovered by backwards time evolution. But is this so? I...

Asked on 01/06/2021 by user1379857

2 answer

How do single-pixel cameras work?

To obtain images using a single-pixel camera we need a Digital Micromirror Device (DMD) because single-pixel cameras only possess a single detector (article). From my understanding, a...

Asked on 01/06/2021

0 answer

Double slit experiment: Single photons of red light mixed with high intensity infrared light

First this is only a presumtion. Let say we fire single photons of red light at the double slit to get a interference pattern on the screen. The distances between...

Asked on 01/06/2021

1 answer

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