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Physics : Recent Questions and Answers (Page 573)

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

The Functional Determinants in Peskin and Schroeder (Eq.9.77)

I'm working on the Eq.9.77 in Peskin (page 304):To demonstrate this, we need only apply standard identities from linear algebra. First notice that, if a matrix $B$ has...

Asked on 02/11/2021 by sky

2 answer

Is the nucleus smaller than the electron?

In the classical incorrect 'billiard ball' model of the atom, electrons are often drawn as smaller balls than the protons and neutrons in the nucleus. However from quantum mechanics we...

Asked on 02/11/2021

3 answer

Nanodiamond Energy Levels

What does it mean to have E or 3A2 energy levels in diamond? For some reason it doesnt conclude with spectroscopic notation found in the Internet. The question in specific...

Asked on 02/11/2021 by F66

0 answer

Can we write energy band of square lattice with vertical magnetic field?

I am interested in a square lattice with the vertical magnetic field. Without a magnetic field, we can know the energy dispersion of the square lattice easily. But, how about...

Asked on 02/11/2021 by Sakurai.JJ

1 answer

Melting point vs pressure

In my physics-class, I was told that, "The melting point of the same substance changes under different pressure. But it can change in two different manner" There are 2 different...

Asked on 02/11/2021

1 answer

Why can't a flame from a lighter touch water from a running faucet

I was conducting an experiment to see if my sink faucet is flammable. I did this by putting a lighter near a running facet. My first guess was that the...

Asked on 02/11/2021 by Goku223344

2 answer

Fermi's golden rule, continuuous spectrum

Usually when the Fermi's golden rule is derived using time-dependent perturbation theory, the notation suggests that the system under consideration has discrete spectrum (quantum harmonic oscillator, infinite square well etc.)....

Asked on 02/11/2021

0 answer

Virial theorem for two particle inelastic collision

Consider two point masses separated by a large distance R so that their initial potential energy can be considered 0. They are both at rest with respect to the Centre...

Asked on 02/11/2021 by Shikhin Mehrotra

1 answer

E-k diagram of hydrogen atom

The energy of a free (nearly free) electron in a solid (say, metals) is given by $E=h^2k^2/2m$ where k is the momentum vector, h is Planck's constant...

Asked on 02/11/2021 by Shaona Bose

0 answer

Aircraft navigation

What is the significance of converting aircraft body axis velocity components into earth axis to relate the same with airspeed (Measured from Pitot tube)? Thanks in advance......

Asked on 02/11/2021 by S.Prabhu

1 answer

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