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Physics : Recent Questions and Answers (Page 826)

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

Collider Luminosity basics

In a collider experiment, the Luminosity is defined as the proportionality factor between the interaction rate and the interaction cross section $dN/dt = Ltimessigma$, with units of $cm^{-2}s^{-1}$....

Asked on 09/19/2020 by Arturo Rodriguez

2 answer

Confusion regarding the appearance of $hbar$ in the eigenfunctions of momentum operator

The two images below are from different books. One has the $hbar$ in the root below which seems right to me as that gets the dimensions correct but...

Asked on 09/19/2020

2 answer

Looking for Burke and Scott Special Relativity Primer

I'm looking for William Burke and Peter Scott's Special Relativity notes. They are very useful as they use a novel approach to space-time diagrams. I used them long ago, but...

Asked on 09/19/2020 by Dirac

2 answer

Infinite acceleration of bob in pendulum with no friction or air resistance

So i'm a bit confused about something. If we take a mathematical pendulum and we apply a force to it. We ignore all friction and air resistance and only consider...

Asked on 09/19/2020

1 answer

How does the Sun generate its energy?

We all know that the sun generates its energy from nuclear fusion in the core. The electromagnetic radiation produced slowly travels upwards, while constantly being absorbed and re-emitted by the...

Asked on 09/18/2020 by Felis Super

4 answer

Heat transfer / dissipation

I have a hollow cylinder made of material A (eg. glass).Inside the cylinder I have some liquid (material B, eg. water). On the outside of the cylinder, wrapped around...

Asked on 09/18/2020 by Dubi Katz

0 answer

Finding Tension in an Elastic String?

I know that this is a homework type question and I'm not asking a particular physics question, but I'm really desperate for help. Here's the question: ...

Asked on 09/17/2020 by Lenol

1 answer

At what point does the SMOT device actually stop working?

The SMOT device described in Wikipedia is said to cause a metal ball to roll uphill and then fall off the ramp. I understand that perpetual...

Asked on 09/17/2020 by stackex555

1 answer

What is the meaning of "comparable Dirac and Majorana terms"?

When reading Mechanism for ordinary-sterile neutrino mixing it is stated in the abstract that: "(...)sterile neutrinos can occur only if Dirac and Majorana mass terms exist which...

Asked on 09/17/2020

1 answer

Using preload to resist bending moment on an unfixed cantilever beam

I have a cantilever beam that is resting against a wall (not fixed) and will not slide (strictly looking at bending moments). The beam of length = 0.3m is under...

Asked on 09/17/2020 by Veelox

1 answer

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