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Physics : Recent Questions and Answers (Page 633)

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

Stability of soap membranes when passing hot water through them

I noticed earlier today whilst washing a wire rack with dish soap that when running hot tap water through some soap membranes that formed in the rack, although most of...

Asked on 01/21/2021 by MC2k

0 answer

Enthalpy Change during Throttling

From the videos I could find over internet, it is written that a liquid at high pressure always cools when throttled through a nozzle or restricted path(this is used in...

Asked on 01/21/2021

1 answer

Positron mass in Dirac sea

I know that the modern correct interpretation of positrons is based on Fock's idea of regarding electrons and positrons on the same footing. But my question is: How did Dirac...

Asked on 01/21/2021 by Bastam Tajik

0 answer

Yet another question about Schrödinger's cat

I had always believed that the point of the (in)famous Schrödinger's cat thought experiment was pretty obvious: people, back then, were puzzled with the state space being...

Asked on 01/21/2021

0 answer

Negative running coupling constant in QCD?

Considering the one-loop running coupling constant in QCD:$$alpha_s(mu) = frac{a_s(mu_0)}{1 + frac{33-2f}{6 pi}lnleft( frac{mu}{mu_0}right)}$$where f is the number of quarks flavours with mass $2m_q leq mu...

Asked on 01/21/2021 by Stefano Barone

0 answer

A confusion regarding the head to tail method for vector addition

Let's say that a particle moves horizontally with a velocity of $v_x$ and vertically with a velocity of $v_y$. Now, when we represent these two velocities and their...

Asked on 01/21/2021

2 answer

Why is the net flux in a cube surface area zero when the source charge is located outside?

Can some one please explain why a charge located outside a box shaped surface area produces zero net flux? I know this question has been asked many times, but I...

Asked on 01/21/2021 by Jerry Hsieh

4 answer

How fast is the Cosmic Microwave Background Radiation (CMBR) changing?

I know that the Cosmic Microwave Background Radiation (CMBR) is the leftover radiation from the "surface of last scattering". However, at every instant the surface is changing...

Asked on 01/21/2021 by Jus12

3 answer

Kutta-Joukowski theorem applied on a Joukowski airfoil (derivation)

I have a doubt about the derivation of the Kutta-Joukowski theorem for a Joukowski airfoil. I know the results, but my main objective is to know how get these ones....

Asked on 01/21/2021 by Élio Pereira

1 answer

How would I go about finding the resonant frequency of a glass pane?

I've done some research, and found some videos and articles on how I could find the resonant frequency of normal objects - By hitting them, and then finding the frequency...

Asked on 01/21/2021 by faraaz akhtar

2 answer

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