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Physics : Recent Questions and Answers (Page 546)

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

Can a system of cubic anharmonic oscillators have multiple stable equilibria?

Consider the Hamiltonian for a System of $N$ anharmonic oscillators $H= sum_{i = 1}^N (frac{p_i^2}{2m_i}+frac{1}{2}k_iq_i^2)+sum_{i,j=1}^N b_{ijk}q_iq_jq_k$ with specific constants $k_i,b_{ijk}, m_i$ and the respective Positions $q_i$...

Asked on 02/21/2021

1 answer

Voyager distance

This very nice NASA page continuously updates Voyager 1 & 2 distance away. How is that distance calculated/determined?...

Asked on 02/21/2021 by relayman357

1 answer

Electric and magnetic fields are two aspects of the same entity

I'm struggling with this doubt.Here it is....There is a infinitely long current carrying wire. A charged particle is projected with a velocity v parallel to direction of flow...

Asked on 02/21/2021 by Satya

2 answer

Why does Gauss's law apply to any shape of a closed surface?

What seems to incredibly bother me is why Gauss's law applies to any shape of a closed surface. Moreover, the fact that the electric flux is proportional to the enclosed...

Asked on 02/21/2021 by Jelle 3.0

2 answer

Navier Stokes: $(u⋅∇)u$ vs $u⋅∇u$

I can find this term stated both ways in different literature. Are they equivalent? It's weird because the dot is a dot product in (u⋅∇), but ∇u being a gradient...

Asked on 02/21/2021 by TravisG

3 answer

Does viscosity arise from the increase in intertia created by the movement of molecules?

Cohesion is how strongly a substance holds itself together, and viscosity has been described as the substance's internal friction. Viscosity has mostly been explained to me via allusions to substances...

Asked on 02/21/2021

0 answer

How is the temporal profile of a wave signal obtained via its overlapping with a pulse signal?

In a thesis I am reading, it is stated that: "The second beam is used to detect the time profileof the THz waveform. This is achieved...

Asked on 02/21/2021

0 answer

Can a particle have multiple spin states at the same time?

In quantum mechanics, particles are described as wave-like. This means, for example, that an electron or photon does not have a well-defined position before one measures it and causes the...

Asked on 02/21/2021

1 answer

Time evolution of a state on adding a constant to the Hamiltonian of the Schrodinger equation

Adding a constant to a potential energy function does not change the dynamics (time evolution) of an object in Newtonian physics. I expect the same to be true in quantum...

Asked on 02/21/2021 by a_point_particle

2 answer

What determines whether a water-cooled nuclear reactor has a positive or negative void coefficient?

If I'm not mistaken it is the case that in water-cooled reactors the water acts both as a neutron absorber (negatively contributing to the amount of fission) and as a...

Asked on 02/21/2021

2 answer

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