Physics Questions, Problems & Solutions : TransWikia.com ~ Page 640

Why do we need to do work to maintain motion of a fluid?

On page 355 of principles of physics by Resnick walker and Halliday, the author writes:Work must also be done on the system (at the input end) to push the entering...

Asked on 01/19/2021

3 answer

Surface charge on a resistive wire in DC circuit

I want to understand how does the energy transfered from battery to the resistor in a simple dc circuit .I read that it is due to the surface charge...

Asked on 01/19/2021 by mohamed kamal

2 answer

Effect of a magnetic field on cathode rays in a cathode ray tube

My question is regarding the direction in which cathode rays bend in a magnetic field. My book states that :When only electric field is applied, the electrons deviate from their...

Asked on 01/19/2021 by Ashok Sharma

5 answer

How to understand the difference between standard entropy and generated entropy

Coming from the definition of entropy variation given as follows: $$Delta S=int ^{2}_{1}left( dfrac {delta Q}{T}right) _{r}+sigma$$ I don't understand the difference between the two parts. Part 1, the...

Asked on 01/19/2021 by Flauta

2 answer

Can Rayleigh scattering be thought of as a special case of the Compton scattering?

The presence of the unmodified line (wavelength) in the scattered X-ray beam, in a Compton scattering experiment, is called the Rayleigh line. This line originates from the Compton scattering of...

Asked on 01/19/2021

1 answer

Surely there can't be other universes with different timelines if people have had proven micro time jumps and weren't disappearing or duplicated

The old age question about grandfather paradox where if somebody goes back in time and kills their grandpa, how can they exist? this was attempted to be answered by doing...

Asked on 01/19/2021 by Coderxyz

0 answer

Actual meaning of the energy in the relation $E=k_bT$

I found in tables that the experimental energy required to brake the bond of the hydrogen molecule H$_2$ corresponds to $E=436$ kJ/mol. So I wanted to convert this...

Asked on 01/19/2021 by Marco Polo Jimenez

2 answer

What does $V(r)$ mean in the Schrodinger equation?

The Schrodinger equation:$$-frac{hbar^2}{2m}nabla^2Psi(r)+V(r)Psi(r)=EPsi(r)$$$$textit{kinetic energy} + textit{potential energy}=textit{total energy}$$Is one of my favourite equations, but there's one term I don't understand: the $V(r)$ term...

Asked on 01/19/2021 by alienare 4422

3 answer

Relative momentum and energy efficiency

I have a rocket with fuel. The fuel weighs 10 and the rocket weighs 1. I expend all the fuel to accelerate the rocket. I observe the velocity of the...

Asked on 01/19/2021 by sosterta

1 answer

In a hollow-core fiber, should be the effective index of the fundamental mode higher or less than the refractive index of the core?

In a hollow-core fiber, the core is filled with air (n=1). To support the propagation of the fundamental mode should the value of the effective index be higher or less...

Asked on 01/19/2021 by Muhamed Sewidan

0 answer

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