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Physics : Recent Questions and Answers (Page 76)

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

Melting ice under pressure

If we put a cube of metal on ice (ice with a certain thickness), under which conditions the cube will penetrate the ice? and how can we calculate the velocity...

Asked on 09/02/2021 by Meryem Assermouh

2 answer

Difference between stationary and non-stationary radiative transfer?

I am currently studying radiative transfer. In researching this subject, I found that there is stationary radiative transfer and non-stationary radiative transfer. However, it is not clear...

Asked on 09/02/2021

1 answer

Why do papers describe the ytterbium ion as having only a single excited state?

Multiple papers describe the ytterbium Yb IV ion as having only two energy levels. Why aren't there more levels in its spectrum?...

Asked on 09/02/2021 by Gayathri

1 answer

Is magnetic field due to current carrying circular coil, zero everywhere except at its axis?

Consider a current ($I$) carrying circular coil of radius$ R$ of $N$ turns.Consider a rectangular loop ...

Asked on 09/02/2021 by user69608

3 answer

How do we take angles in the limits of integrals in Physics?

I am looking at the following derivation of the potential energy of a dipole in a uniform electric field, paraphrased from phys.libretexts.org:Consider an electric dipole $p$...

Asked on 09/02/2021

1 answer

Potential difference and gravitation

If I take a ball from the ground and take it to the top of 3m tower ,if I drop it, is it due to the fact that potential energy...

Asked on 09/02/2021

2 answer

Minimum Angular Velocity

A bead is free to slide on a vertical circular frame of radius $R$ comes to equilibrium when $cosθ = g/Rω²$.The minimum value of angular velocity comes out...

Asked on 09/02/2021 by Vasu Goyal

2 answer

Does the Stern-Gerlach experiment really suggest superposition?

The Stern-Gerlach experiment is often cited as evidence of quantum superposition and there are some very simple explanations like this one https://www.youtube.com/watch?v=hkmoZ8e5Qn0 in which spin on...

Asked on 09/02/2021 by Drummy

1 answer

Can matter waves of bound systems experience dispersion? If so, how would it manifest itself experimentally?

Electromagnetic waves experience dispersion and these result in a "chirp" in frequency after traversing some distance. This chirp can be heard when waves from a lightning strike in one magnetic...

Asked on 09/02/2021

2 answer

Symmetries in QFT

There are very famous Coleman–Mandula theorem and Haag–Łopuszański–Sohnius theorem , see also this and this. It states that "space-time and internal symmetries cannot...

Asked on 09/02/2021

0 answer

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