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Physics : Recent Questions and Answers (Page 149)

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

Cube cooling Fourier series coefficients

I wanted to solve a heat equation for cube which has initial temperature of $100°C $ and is cooling to the temperature of $20°C$. I calculated heat equation...

Asked on 07/30/2021 by Agata Bielecka

1 answer

Solving for transmission coefficient in the finite square well

Consider a finite square well of depth $V_0$ and which extends from $-a$ to $a$. For $|x|>a$, $V=0$. The wavefunction ansatz one can propose for...

Asked on 07/30/2021 by Nick.25

1 answer

Better approximations with two sticks

How approximation ought to be done always confuses me. Considering this problem in a textbook:Two massless sticks of length $2r$, each with a mass $m$ fixed at its middle, are...

Asked on 07/30/2021 by Shing

2 answer

Launch angle affecting the splash height of a ball

I need to do an experiment about the launch angle of a ball affecting its splash height. I have no idea if it's feasible or not, and I can't find...

Asked on 07/30/2021

2 answer

Is it enough to give a time-orientation to define a spin structure?

Maybe I got it wrong and my question doesn't make sense, excuse me if that's the case. For a smooth Lorentz 4-manifold $(M, g)$ with signature $(- +...

Asked on 07/30/2021 by Joao Vitor

1 answer

Is it possible to use forces on a current carrying conductor due to Earth's Magnetic field to levitate?

When current is applied, a conductor within a magnetic field feel a force. This is the Lorentz Force. I was thinking if it is then possible to apply as much...

Asked on 07/30/2021 by Vinicius Araujo Ritzmann

4 answer

Why does the potential across the terminals of battery increase on moving from negative terminal to positive terminal?

I really want to know that how does battery create a potential difference across the circuit. When we cross the battery from its negative terminal to positive terminal the potential...

Asked on 07/30/2021

2 answer

About the fluid friction along the wall in pipes

I wonder how can the friction between a fluid and a wall in a cylindrical pipe can be calculated. Is there any theory that I can refer to? I also...

Asked on 07/30/2021 by Mathcho

1 answer

What is the meaning of a non-resonant neutrino production?

What is the meaning of non-resonant production in the following context:They assumed a negligible primordial lepton number,or asymmetry, sothe neutrinos are produced non-resonantly. [1]I thought that this meant that...

Asked on 07/30/2021

1 answer

Relationship between Angular and Linear momentum

Recently, I came across this interesting problem about billard balls. The question asks us to determine the height $h$...

Asked on 07/30/2021

1 answer

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