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Physics : Recent Questions and Answers (Page 128)

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

Voltage - Current Relationship (IV graphs)

This is probably a really simple question but for some reason, I'm finding it difficult to grasp at an atomic level. My physics textbook has a statement that says: "As...

Asked on 08/08/2021

1 answer

Rotation of crystal structure to match with match another structure of same compound/polymorph

Say, I have two crystal structures of a particular organic molecule, the crystal structures are basically identical, apart from a rotation and redefinition of the lattice vectors/angles, a simple result...

Asked on 08/08/2021

0 answer

What do you call a factor that isn't a dependent, independent, or controlled variable?

I'm doing an experiment investigating the Mpemba effect. I measured some factors that may have contributed to the time it took the water to freeze (defined as the point where...

Asked on 08/08/2021

2 answer

How do chemical propulsion systems not break the law of conservation of energy?

Lets say that hypothetically we have a rocket with constant mass, and an engine providing a constant force. I understand that it is unrealistic to have a rocket of constant...

Asked on 08/07/2021

4 answer

Can interference take place in medium itself?

Just a thought came when i encounter this problem , here as many beams r meeting , they can also interfere in medium like air too isnt ? I know...

Asked on 08/07/2021 by WizardMath

2 answer

Water flow through a ventilated orifice

Before I begin, please excuse the rushed and poor schematic made in haste.I am not very knowledgeable in fluid dynamics and was curious when I observed the scenario below....

Asked on 08/07/2021 by GitGoodCodes

0 answer

Initial conditions in Lagrangian mechanics

If we consider physical systems where we have initial conditions, such as a rolling circle having initial initial velocity $v$, what does our Lagrangian look like?...

Asked on 08/07/2021 by Terry

2 answer

Spontaneous symmetry breaking with 1 massive scalar but three unbroken generators?

Consider some theory of four real scalar fields, $phi_1$, $phi_2$, $phi_3$ and $phi_4$, that is invariant under a global $$SO(4)cong SU(2)_Ltimes SU(2)_R$$ symmetry. We can...

Asked on 08/07/2021

2 answer

Calculation of an amplitude using the Grassmannian approach (amplituhedron)

In the following review paper on scattering amplitudes, by Elvang and Huang:https://arxiv.org/abs/1308.1697 they calculate the amplitude for 6 particles with half of positive helicity and half...

Asked on 08/07/2021

0 answer

Existence of atoms - Einstein or Smoluchowski

When Einstein's seminal work on Brownian motion is discussed, Smoluchowski's name often comes up as having derived more or less the same results as Einstein, but from the perspective of...

Asked on 08/07/2021 by algae

2 answer

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