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Physics : Recent Questions and Answers (Page 69)

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

How can individual force components add up to more than the magnitude of the original force vector?

If I am breaking down a force $1$ N which is applied in one dimension on a mass. If the $x$-axis were collinear with the force vector, then...

Asked on 09/04/2021 by Austin Eichelberg

1 answer

Scattering off of a bi-local potential

I am trying to figure out the scattering wave function for the following potential: $$V(x,x')=-A phi(x)phi^*(x')$$Such that the SE can be written as$$[frac{hbar^2partial^2_x}{2m}-E]psi = Aphi(x)int dx'phi^*(x')psi(x')$$This has...

Asked on 09/04/2021

1 answer

Oil spreading over water

The book says that oil spreads over water due to the greater surface tension of water as compared to oil, so the comparatively stronger water film stretches the oil surface...

Asked on 09/04/2021

1 answer

Why cars rotate during small overlap crash test?

i was watching a small overlap car crash test video and i noticed that the car rotate to the right side during the collision. my question is why the car...

Asked on 09/04/2021 by D. Frederico

1 answer

How to use the gravitational redshift formula?

At hyperphysics they give this general formula for a Schwarzschild background: $$frac{v_{infty}}{v_0}= left( 1-frac{2GM}{r_0 c^2} right)^{frac{1}{2}}, tag{1}$$ and a formula (2) "to express...

Asked on 09/04/2021 by user104372

1 answer

Gradient is covariant or contravariant?

I read somewhere people write gradient in covariant form because of their proposes.I think gradient expanded in covariant basis $i$, $j$, $k$, so by invariance nature...

Asked on 09/04/2021 by user27058

7 answer

Finding the pressure in vacuum

I have the following question And I have the formula for finding the pressure difference which is as follows:P(below) =...

Asked on 09/04/2021

1 answer

What is a structure function (or proton structure function)?

Can someone explain structure functions (proton structure functions)? I know they are used to study or understand the structure of protons , but does there exist a particular formula to...

Asked on 09/04/2021

1 answer

How does a photonic tensor core work?

There has been much media coverage of the paper Photonic Tensor Cores for Machine Learning:https://www.independent.co.uk/life-style/gadgets-and-tech/news/ai-machine-learning-light-speed-artificial-intelligence-a9629976.htmlhttps://www.sciencedaily.com/releases/2020/07/200721114731.htmhttps://techxplore.com/news/2020-07-photon-based-enable-complex-machine.htmlHowever, neither the paper...

Asked on 09/04/2021

2 answer

How to find the magnetic field due to a revolving electron of hydrogen atom in first orbit

So, I was thinking about the Bohr model of atom and I started to wonder how we could find the magnetic field due to a revolving electron (produced at the...

Asked on 09/04/2021 by Sai Saandeep

1 answer

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