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Physics : Recent Questions and Answers (Page 75)

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

Faradays law and EMI confusion

According to EMI definition, it is the changing magnetic field acting ON the conductor that induces an emf. However when using Faraday’s law, instead of finding the changing magnetic field...

Asked on 09/02/2021

2 answer

Partition function for a system in local thermal equilibrium

For a system in equilibrium, the partition function is standard.But if the system is in local thermal equilibrium but stationary (i.e. zero or negligible time variation), but the temperature...

Asked on 09/02/2021

0 answer

A Problem Regarding Cauchy's Fundamental Lemma

In Continuum Mechanic Cauchy's Fundamental Lemma states that:The stress vectors acting on opposite sides of the same surface are equal in magnitude and opposite in direction. Cauchy's fundamental lemma is...

Asked on 09/02/2021

1 answer

Why is the centripetal force non-conservative while the centrifugal isn't?

Aren't both perpendicular to $R$?Also, doing $nabla times vec{F}$ using $hat{r}$, $hat{t}$, $hat{k}$ as versors (with $t$ tangent to $r$ and ...

Asked on 09/02/2021 by demagorgico

1 answer

What happens to surface tension upon increasing surface area

Pretty self explanatory title. But I just read in a book that the surface tension remains same even if the surface area is increased. What could be a possible explanation...

Asked on 09/02/2021 by user140805

2 answer

Stationary equation of radiation transfer: Which one is correct?

I am currently studying radiative transfer. I have seen the stationary equation of radiative transfer written in two different ways: 1.$$dfrac{partial{I}(mathbf{r}, mathbf{s})}{partial{s}} = - mu_t I(mathbf{r},...

Asked on 09/02/2021

1 answer

How to calculate the potential energy of an $H_2$ molecule

From left to right, electron $e_1$, $e_2$ and proton $p_1$, $p_2$. $r_0=0.529nm$ The total energy is sum of energy require to bring each particle...

Asked on 09/02/2021 by aukxn

1 answer

Why does a semiconductor surface electron accumulation layer induce the downward band bending?

While there is a depletion of charge carriers close to the surface of most semiconductors, some semiconductors for example InAs, show a electron accumulation layer at their surface, where the...

Asked on 09/02/2021 by hitgirl

1 answer

Action-Reaction pair in free body diagram

when we draw a free body diagram of an object(at rest) hanging to a string we say that the normal force = gravitational force does this mean that...

Asked on 09/02/2021 by Shivansh Sood

3 answer

What is the solid angle $dOmega$ in radiative transfer?

The Wikipedia article for radiative transfer gives the following definition:In terms of the spectral radiance, $I_{nu }$, the energy flowing across an area element of area...

Asked on 09/02/2021

2 answer

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