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Physics : Recent Questions and Answers (Page 258)

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

Why is hydrogen ion much more likely to be +1 than -1?

With the chem 101 description of the periodic table, we ascribe certain "desires" to elements. Atoms "want" a full valence shell; for alkali metals, that is most easily done by...

Asked on 06/16/2021

1 answer

Increase force exerted by a body's weight using electricity

I would like to ask if there is any mechanism that can increase the weight force of a body using electricity. For example, this mechanism is enclosed in a box...

Asked on 06/16/2021 by Stylianos Charalambous

1 answer

Conceptual problem about non-equilibrium steady state

I have a problem understanding what exactly is non-equilibrium steady state. Let's say the system starts with an equilibrium state at remote past. We should have the density operator given...

Asked on 06/16/2021

2 answer

How does potential energy increase without increasing matter?

It's a philosopher here - not a physicist, so please bear with me. When I increase the potential energy of a spring by compressing it, I increase its mass according...

Asked on 06/16/2021

4 answer

Physical implication of $textbf{E}rightarrowtextbf{B},~~textbf{B}rightarrow -textbf{E}$ invariance of the Maxwell's equations

An interesting observation to consider about the Maxwell's equation is that in absence of the sources, the equations are symmetric under the interchange $$textbf{E}rightarrowtextbf{B},~~textbf{B}rightarrow -textbf{E}tag{1}$$ apart from some numerical factors...

Asked on 06/16/2021

2 answer

The problem of charging and discharging between two capacitors when the charges of their poles are not equal

Sorry, my English is not good, I try to describe the problem as clearly as possible. As shown in the figure: C1 and C2 are two ideal flat capacitors with...

Asked on 06/16/2021 by lilin

0 answer

How to measure the speed of an electric current?

We all know that the definition of a current is the amount of charge flowing per second, that is often expressed by the equation $i=dq/dt$. But is it possible...

Asked on 06/15/2021 by Amzal Ahmed

4 answer

Does speed affect friction in fluids? If yes, how?

If a solid body is moving through a fluid, does its speed has any effect on the drag force felt by it?...

Asked on 06/15/2021

2 answer

Sidebands in spin-oscillator coupled devices

I am researching spin-oscillator hybrid devices (particularly those coupled to NV centers), and I have come across this paper investigating the strain field of a cantilever and...

Asked on 06/15/2021 by bbbb

0 answer

How do I tell if a symmetry is gauge or not?

I understand the interpretation given in topics like this one that gauge symmetries are "fake" in the sense that they do not represent an actual difference in physical states....

Asked on 06/15/2021

1 answer

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