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Physics : Recent Questions and Answers (Page 134)

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

Is it possible to determine entropy change without thermal expansion?

I was recently told by a colleague that one could "easily calculate entropy change of a solid using only Cp and isothermal compressibility constant (along with experimental parameters:Vsolid, P0, Pf,...

Asked on 08/05/2021 by LumaSunrise

0 answer

Is the set of spacetime manifold a set of event?

In general relativity spacetime is defined as manifold.Is this manifold the set of events? For example if our universe is constituted of only one non-interacting particle, should our manifold...

Asked on 08/05/2021

4 answer

Are Weyl and Dirac points topological defects in nodal semimetals?

Recently, I heard the Weyl and Dirac points are topological defects in nodal semimetals. I do not really get it. And the definition of topological defects is confusing to...

Asked on 08/05/2021

1 answer

How does light water prevent criticality of natural uranium even as it is outside the zirconium cladding?

The main reason heavy water is used to allow nuclear reactors to operate with nuclear reactor is that they do not absorb neutrons, allowing an increase in neutron temperature that...

Asked on 08/05/2021

1 answer

Lagrangian and Hamiltonian EOM with dissipative force

I am trying to write the Lagrangian and Hamiltonian for the forced Harmonic oscillator before quantizing it to get to the quantum picture. For EOM $$mddot{q}+betadot{q}+kq=f(t),$$ I write the Lagrangian...

Asked on 08/05/2021 by user56199

2 answer

Upper bounds on phase space momenta

Suppose I wish to calculate the phase space volume for the process $overline{X}X to A_1 A_2 A_3 A_4 A_5$ in the CM frame of $overline{X}, X$ so that...

Asked on 08/05/2021

0 answer

How to find the magnetic field due a time varrying current carrying wire at a point P?

While studying Biot Savert law,I was thinking how can we find the magnetic field due to a wire carrying time varying current using Biot Savert Law?I read an answer...

Asked on 08/05/2021 by EduHub India

0 answer

Oldest population 1 star system?

While reading Stanislaw Lem's essays on advanced civilizations, I had a question: When did the earliest generation of population 1 star systems form? How much older...

Asked on 08/05/2021

2 answer

Linearised diffeomorphisms on arbitrary gravitational background Part 2

This question is a follow on from my recent post here, in the sense that I will use the notation introduced there. In that post, I considered infinitesimal diffeomorphisms...

Asked on 08/05/2021 by NormalsNotFar

0 answer

Solid State Lattice accuracy

If everything is always moving when there is some heat in the nearby. I mean that every atom in your bulk is constantly beating upwards and downwards and so on....

Asked on 08/05/2021

0 answer

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