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Physics : Recent Questions and Answers (Page 127)

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

Why is the electric field inside a conductor zero at every point?

There are a couple of arguments on how the electric field inside a conductor is zero. Some of them appear to me to be unreasonable; I will explain. Let's consider...

Asked on 08/08/2021 by silver_souls

5 answer

Transit of Venus and the computation of the Astronomical Unit

I have searched for the computation of the AU. The two best websites I found about it werehttps://sunearthday.nasa.gov/2012/articles/ttt_75.phpHow did Halley calculate the distance to the Sun...

Asked on 08/08/2021 by Brasil

1 answer

Is the surface of a closed object which encloses a point charge always equipotential?

If I consider A and B to be two points and charge q is placed inside the cavity ( kindly...

Asked on 08/08/2021

1 answer

Can we say that the curl of $E$ for an electromagnetic wave is zero?

here (page 11) the following statement is written about the curl of the electric field in a TEM wave on a transmission line (⊥ indicates the component...

Asked on 08/08/2021

1 answer

Computing the metric tensor from its Killing vectors?

On page. 139 of Carroll's GR book, during the discussion of Killing vectors, he quotes an explicit coordinate basis representation for the Killing vectors on $S^2$: begin{array}{l}R=partial_{phi}...

Asked on 08/08/2021 by sylow1

3 answer

What does a wing do that an engine can't?

This isn't a question of how a wing works -- vortex flow, Bernoulli's principle, all of that jazz. Instead, it's a question of why we need a wing at all....

Asked on 08/08/2021 by yshavit

16 answer

Why liquid in a duct flows when there is a pressure difference?

Liquid flows in a pipe when a pressure difference is applied on the ends. But can a liquid flow even if there is no pressure difference?Like in case the...

Asked on 08/08/2021 by Saptadip

2 answer

Why is easier to measure directly the rate of increase of the volume than the rate of increase of the radius?

I'm reading a Calculus textbook and it says:If we are pumping air into a balloon, both the volume and the radiusof the balloon are increasing and their rates of...

Asked on 08/08/2021

2 answer

Dimensional regularization: removing more than just logarithmic divergencies?

I have followed two courses on QFT, which both involved renormalization by dimensional regularization. My confusion is that one of the professors claimed that dimensional regularization can only be used...

Asked on 08/08/2021

1 answer

Electrostatic Energy of conducting shell and maximum electric field it can tolerate before breaking

I stumbled upon an interesting phenomenon where the conducting shell can bear up to a certain limit of electric field before tearing apart. Actually it is like a uncharged metallic...

Asked on 08/08/2021

0 answer

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