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Physics : Recent Questions and Answers (Page 318)

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

What is the physical meaning of reduced mass?

If we stick two block masses by a string and pass it over a pully and let the blocks free then mathematically we can obtain that the whole weight on...

Asked on 05/22/2021 by Soubhadra Maiti

4 answer

Newton's Third Law and Net Force

As shown in the diagram above, the object with thrust $T$ exerts a force downwards towards the Earth. The Earth also...

Asked on 05/22/2021 by Hew Jhong

2 answer

Can we detect gravitons this way?

First, we shoot a collection of particles (let's exclude gravitons from these, just for the sake of clarity) through a large region of spacetime in which the stress-energy tensor is...

Asked on 05/22/2021

3 answer

Conservation of momentum in single slit experiment

I am reading about the uncertainty principle and its stated that we can not simultaneously determine the position and momentum of a photon. But my question is, if you know...

Asked on 05/22/2021 by Tommy Wong

1 answer

How to show that momentum is conserved when tachyon interacts with normal matter?

The problem is as follows: Show that when tachyons interact with normal particles, then a normal particle can emit a tachyonso that the total energy and 3-momentum are conserved....

Asked on 05/22/2021 by aLLiteration

0 answer

How do I calculate the EM fields of a massless charged particle?

I am trying to calculate the Electromagnetic fields from a massless charged particle. I am trying to reproduce the starting results given in the "Electromagnetic fields of...

Asked on 05/22/2021

1 answer

An essential exercise involving spin composition

Suppose we have two particles with spin $1/2$. They have $S^{tot}=1$ and $S^{tot}_y=0$.How can we write the state of the system in terms of the eigenstates...

Asked on 05/22/2021

2 answer

Extensional flow of a long thin thread

My question is simply how the highlighted equations at the bottom of the following article are obtained. In particular I cannot seem to understand where the term containing external pressure...

Asked on 05/22/2021

1 answer

Enthalpy vs enthalpy of reaction

I have a problem with understanding basic concept about enthalpy.I know there is an enthalpy (heat) of formation which tells how much energy is going to be released or consumed...

Asked on 05/22/2021 by Łukasz

2 answer

Moment on a rectangular concrete slab

Here is a picture from my engineering textbook. It describes a concrete slab being subjected to normal force $P$...

Asked on 05/22/2021

0 answer

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