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Physics : Recent Questions and Answers (Page 117)

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

Stainless Steel in Kitchen Dishwasher Doesn't Dry

I find that stainless steel tools, especially the shiny ones, stay wet after the (no heat) dry cycle while ceramic plates are dry. The water beads on the shiny...

Asked on 08/12/2021

0 answer

Why does an increase in pressure of a gas not increase it's kinetic potential energy?

An excerpt from my textbook:It is assumed that there is no macroscopic motion of the system. Therefore, $Delta E_{mech} = 0$ and the first law of thermodynamics can be...

Asked on 08/12/2021 by J. Grohmann

1 answer

Why "diagonal" polarization doesn't decohere?

It is often said, that qubit should be maintained under very low temperature and kept highly isolated not to decohere. But we can represent $|0rangle$ with vertical polarization of...

Asked on 08/12/2021

0 answer

Work done by friction force

As we know that when we walk, point of foot application does not move, so work done by friction force is zero. Then why do we get tired while walking?...

Asked on 08/12/2021 by user42148

3 answer

How can entropy increase in a reversible process?

According to Wikipedia, a reversible process is "a process whose direction can be "reversed" by inducing infinitesimal changes to some property of the system via its surroundings, with no increase...

Asked on 08/12/2021

2 answer

Do acoustic waves in liquid crystals have transverse modes?

According to a previous question: Modes of propagation in media acoustic waves in media can be decomposed in two kinds of modes: longitudinal and transverse; solids being the only...

Asked on 08/12/2021 by Elkin Montoya

1 answer

Do metal alloys exist with work function of ~1.4eV?

I am wondering if metal alloys with a work function of between 1.1-1.7eV (ideally 1.4eV) exist? Some information exists on photoelectric work functions of metals here and...

Asked on 08/12/2021

0 answer

Black body radiation and second law

I'm struggling on finding what's wrong with my model of the following system which seems to break the second law: Imagine two punctual perfect black bodies at two temperature ...

Asked on 08/12/2021 by vaferdolosa

2 answer

Thermal AdS and the Hawking Page phase transition

I have some difficulty understanding the concept of pure thermal radiation, as described in Hawking and Page's paper on the Hawking-Page phase transition. The four-dimensional thermal AdS solution (with cosmological...

Asked on 08/12/2021 by ScroogeMcDuck

1 answer

Rolling on frictionless surface

Consider a body like a ball on a frictionless horizontal surface. I apply some force F tangent on it, at the top. Will it translate?I was confused if it...

Asked on 08/12/2021

6 answer

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