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Physics : Recent Questions and Answers (Page 630)

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

How does centripetal force changes the direction of velocity isn't it a violation to Newton's second law of motion?

Newton's second law is a vector law.When when we resolve it in component form along the x, y and z axes we can conclude that force changes only the...

Asked on 01/22/2021

1 answer

Does alpha decay have anything to do with weak interaction?

In alpha decay, an atomic nucleus emits an alpha particle (identical to a helium-4 nucleus). This happens in large nuclei because the nuclear force keeping the nucleus together is outweighed...

Asked on 01/22/2021 by David Cian

1 answer

Do frequency of electromagnetic waves determine its energy, actually?

In a disturbance in water, the effect of disturbance reduces at distance as the area the wave covers increases decreasing the energy density, ensuring total energy given remains constant. Thinking...

Asked on 01/22/2021

6 answer

What is the characteristics time scale of a quantum system, in context of the Markovian approximation?

In the theory of open quantum system, we make the markovian approximation when the timescale of the memory of the reservoir is small. But this timescale is measured with respect...

Asked on 01/22/2021 by Prem kumar

1 answer

Why crystal growth tends to be selective for a single species?

Crystals are composed of the same stuff assembled in a periodic fashion. I understand that there are possible and less possible bonds. Like complementary electric charge, ie. things must stick...

Asked on 01/22/2021

0 answer

Interference through double slit caused by slit interaction?

How do the experimenters ensure that the interference pattern produced in the double slit experiment is not due to the interaction of the atoms at the boundary of the slit...

Asked on 01/22/2021 by Frank McCain

1 answer

Microscopic explanation of colligative properties from the entropy related viewpoint

In the chapter 28.6 of book "Concepts in thermal physics "(2nd edition) written by Stephen J. Blundell, there is a sentence says "Adding a small quantity of solute to a...

Asked on 01/22/2021 by 8cold8hot

1 answer

How important is floating-point precision in molecular dynamics?

I'm wondering how important floating-point precision is in numerical simulations of molecular dynamics in biology. From what I understand, molecular dynamics programs like NAMD use 32-bit...

Asked on 01/22/2021

2 answer

Transformation of a Lagrangian

$$L(lambda,mu,dot{lambda},dot{mu})=frac{m}{2}(lambda^2+mu^2)(dot{lambda}^2+dot{mu}^2)-alpha lambda^2mu^2,$$ I'm supposed to express this Lagrangian through $x=lambda^2-mu^2$ $y=2lambdamu$ My first thought was to use $x+mu^2=lambda^2$ by putting it into the second...

Asked on 01/22/2021 by Chrononaut

1 answer

Tensors time derivative in moving frames

I know that the following relation exists between the time derivative of a proper vector "v" in an "absolute" frame A and the time derivative of the same vector in...

Asked on 01/22/2021

1 answer

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