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Physics : Recent Questions and Answers (Page 604)

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

Good lecture notes or books on field theory/mechanism in gravitational field?

In gravitational field, the things are usually different from those in flat spacetime. For instance, sometimes you have to use covariant derivative $nabla$ instead of ordinary differential $partial$,...

Asked on 01/31/2021

1 answer

Confusion regarding centrifugal force

In this https://youtu.be/YCrFwQtW5o0 sir took a disk and demonstrated that the particles kept on it fly away due to centrifugal force. Now, suppose I take a ring...

Asked on 01/31/2021 by Prateek Mourya

1 answer

Why is resting membrane potential or a membrane depolarisation localised to the membrane?

Why would a membrane depolarisation be localised to one part of the membrane? If adjacent areas have a more negative potential shouldn't the difference in potential cause charge to flow...

Asked on 01/31/2021 by liyuan

2 answer

What is the significance of Planck units?

There are many questions asked about different Planck units. This question is just a generalization of all of those questions. Planck units are considered to be natural units. The thing...

Asked on 01/31/2021 by Jhuma Sarkar

1 answer

Compton Scattering in Substances Other Than Graphite

When reading about Compton scattering I see the following figure: It shows that as a function of scattering angle the...

Asked on 01/31/2021 by user1551817

1 answer

How can gravitational potential energy be stored in empty space?

If I pick up a rock and set it on a ledge above my head, I do work in the process. The work I do is termed "potential energy". We...

Asked on 01/31/2021 by M. Pope

2 answer

Why is $langle textbf R rangle =Tr rho R$ here $rho$ is the state density matrix

I came across this, begin{post}To each state there corresponds a unique state operator.The average value of a dynamical variable textbf{R}, represented by the operator $R$ ,in the virtual ensemble...

Asked on 01/31/2021 by Boltzee

2 answer

Why do mountains disappear into the distance?

Traveling south on CA 99 we noticed that atmospheric conditions were exceptionally clear and played a little game attempting to determine how far away we could identify Shasta. As we...

Asked on 01/31/2021

1 answer

General Approach to Computing Velocity of frames in Special Relativity?

I've been self studying some special relativity by reading some textbooks, and I'm somewhat confused about the process of computing velocities. The book I'm reading primarily identifies computation of velocities...

Asked on 01/31/2021 by stanfordude

1 answer

How do we know that we have taken all factors into consideration while deriving Coulomb's Law?

It was experimentally deduced that$$F_e propto q_1q_2$$$$F_e propto dfrac{1}{R^2}$$where $F_e$ denotes the electrostatic force between two charged particles with the magnitude of their charges...

Asked on 01/31/2021

0 answer

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