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Physics : Recent Questions and Answers (Page 845)

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

If irreversible process is quasistatic then can we find it's work using $pdv$ formula?

Now it's given on Wikipedia that quasistatic process can be irreversible,so can I find the work done by the closed system undergoing a process using $pdv$ work?...Next, is that...

Asked on 08/05/2020 by Jatan Amin

1 answer

Trying to understand a visualization of contravariant and covariant bases

I was trying to intuitively understand the covariant and contravariant bases for a coordinate system and I came across this image on Wikipedia: Edit: After reading...

Asked on 08/05/2020

6 answer

Spinor Helicity Formalism: Reference Spinors $q$ in Compton Scattering

My question is rather straight forward, but the setup in order to pose the question is a little lengthy; please bear with me! I am trying to calculate the average...

Asked on 08/05/2020 by user4580791

0 answer

Electromagnetic wave associated with a single photon

To the question regarding the relation between the energy of a photon (E = hf) and the energy of the associated electromagnetic wave, I read somewhere that the energy of...

Asked on 08/05/2020 by Jean-Michel Tengang

1 answer

Detailed balance: What does one rigourously mean by the transition rate $dw$?

Consider (for example) non-relativistic electron-impact ionisation, in which an effectively stationary atom in state $I$ is struck by an electron of momentum ${p_1}$, producing an atom in state...

Asked on 08/05/2020 by catalogue_number

0 answer

Fields due to Möbius Strip

Is there any way to calculate the following from a möbius strip? (a) Electric Field :Given that the strip is an insulator and has localized charge uniformly distributed over its...

Asked on 08/05/2020 by Anindya Prithvi

1 answer

Safety devices like fuses should be connected with the live wire rather than the neutral wire?

So, I was told in my class that Safety devices like fuses should be connected on the live wire. But isn't the conventional current opposite to the direction of the...

Asked on 08/05/2020 by Doodoo28

3 answer

Does aerogel "blow up" in a vacuum?

Discussions in comments below How can aerogel be lighter than air? really make an answer to this important. The conclusions there are that aerogel could in some cases be...

Asked on 08/05/2020

2 answer

Question on Introduction to Electrodynamics divergence examples

I was going through the section on divergence and became confused on these examples.Griffith states in the textbook that (a) has positive divergence, (b) has zero divergence, and that...

Asked on 08/04/2020

1 answer

Vortex formation in an airfoil

How is a starting vortex formed when an airfoil (i.e cross-section of wings of a plane) starts to move?...

Asked on 08/04/2020 by PATRICK

1 answer

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