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Physics : Recent Questions and Answers (Page 737)

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

When an object is on an inclined plane the perpendicular gravitational component is equal to the normal force. How can you conclude this?

When an object is on an inclined plane the force of gravity acts downwards on the object and the normal force is perpendicular to the surface of the inclined plane....

Asked on 12/15/2020 by user274098

2 answer

How the classical linear correlation of spin is derived?

I found this image on Wikipedia under Bell's theorem. I understand the blue curve generated by quantum mechanics, but couldn't...

Asked on 12/15/2020 by Tough questions

0 answer

Prove that the parity operator is Hermitian

We know that an operator is Hermitian when: $langle f|hat{O}grangle$ = $langle hat{O} f|grangle$ Parity operator in 1D is simply defined as: $hat{Pi} f(x) = f(-x)$...

Asked on 12/15/2020

2 answer

Preserving half of supersymmetries - why is this important?

I am going through this paper on the Big Bang singularity using an M(atrix) theory description. A type IIA superstring moves through a linear dilaton background in...

Asked on 12/15/2020 by saad

1 answer

How long and how much water will boil at room temperature in a vacuum chamber

Let's say, I have a vacuum chamber of diameter D and height h. I have filled 1/10th of the chamber with water. Now I have two questions: 1.How long and...

Asked on 12/15/2020

1 answer

How to resolve a horizontal force acting on an object in an incline plane into a parallel force?

A particle of weight W Newtons is supported on a smooth inclined plane by two forces each equal inmagnitude to half the weight, one acting horizontally and the other...

Asked on 12/15/2020 by Nhoj_Gonk

1 answer

What is known about the density of states of the Anderson model?

This question was posted a week ago on MathOverflow without an answer:https://mathoverflow.net/questions/369156/what-is-known-about-the-density-of-states-for-the-anderson-model The Anderson Model is given by the random Hamiltonian (as an operator on $l^2(mathbb{Z}^d)$)...

Asked on 12/14/2020

1 answer

Lorentz Force Equation

We know that from relativistic Lagrangian for a charged particle is $$L = - m_0 c^2 sqrt{1 - frac{u^2}{c^2}} + frac{q}{c} (vec u cdot vec A) - q Phi$$...

Asked on 12/14/2020 by I Gde Daffananda

4 answer

In what sense is a quantum damped harmonic oscillator dissipative?

The classical Hamiltonian of a damped harmonic oscillator $$H=frac{p^2}{2m}e^{-gamma t}+frac{1}{2}momega^2e^{gamma t}x^2,~(gamma>0)tag{1}$$ when promoted to quantum version, remains hermitian. Therefore, the time evolution of the system is unitary and probability...

Asked on 12/14/2020

0 answer

How to extract wavelet from signal?

I got signal with different wavelets, the first wavelet is strongest one and I need to extract it from signal. It could start at t >= 0, it is not...

Asked on 12/14/2020

0 answer

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