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Physics : Recent Questions and Answers (Page 535)

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

What is the ratio of energies of Hydrogen in its first excited state and second excited state?

Since Energy of an electron in a particular orbit is given by$E= -13.6/n^2$ eVSo, I equated the energies in $n=2$ and $n=3$ which are the...

Asked on 02/25/2021

1 answer

Ladder operators vs. conjugate variables

In the book Introduction to Many-Body Physics by Piers Coleman, it states on page 12 that... the particle field and its complex conjugate areconjugate variables.In...

Asked on 02/25/2021 by Hermitian_hermit

2 answer

How is gravity proportional to space-time curvature in the rubber-sheet analogy?

In General Relativity, Einstein established that gravity is due to the curvature produced by objects in space. We all know that gravity is proportional to mass. The picture Einstein painted...

Asked on 02/25/2021 by Vvk

4 answer

Iodine-131 half-life and reality

Iodine is a chemical element with symbol I and atomic number 53.There is currently a lot of discussions regarding radioactivity in Japan, and iodine-131. Iodine-131 has...

Asked on 02/25/2021 by e2-e4

6 answer

Potential drop across a dielectric capacitor with battery

I have a capacitor (C) connected to a battery of emf 100V. Hence potential drop across my capacitor is 100V. Now I introduce a dielectric between the plates of capacitor...

Asked on 02/25/2021 by Vivek karunakaran

1 answer

Table saw kickback momentum

When using a table saw, the operator needs to be very careful to avoid kickback. This is where the the teeth on the far side of the rotating blade lift...

Asked on 02/25/2021 by Harry Jones

2 answer

Why is it not possible to run electrical plants on oxygen (rocket fuel) or hydrogen rather than coal?

Title basically says it all. I'm not a physicist by any stretch. I'm an IT professional with slightly more than a passing interest in mechanics. I got to thinking the...

Asked on 02/25/2021 by Ramy

4 answer

Why is there a “problem of time” in Quantum Gravity?

It’s often said that the problem of time exists because time is treated as absolute in quantum mechanics but not so in General Relativity, see e.g. A list of...

Asked on 02/25/2021 by Thatpotatoisaspy

3 answer

Hall effect with open orbits

Could any one draw a picture like this for hall effect for open orbits? I mean what happen to electron flow if open orbits considered?...

Asked on 02/25/2021

0 answer

Does Conservation of Four-Momentum imply Conservation of Energy in Particle Physics?

In Particle Physics processes, we always assume four-momentum conservation. Does this automatically lead to energy conservation, since the four-momentum conservation must be fulfilled for every component, hence also for the...

Asked on 02/25/2021

1 answer

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