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Physics : Recent Questions and Answers (Page 74)

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

How is the centripetal force of a car when turning distributed over the wheels?

The centripetal force can easily be calculated as: $F = (M*v^2)/R = (M*v^2)*sin(delta)/L$. But how is this force distributed over the (front and rear)...

Asked on 09/03/2021 by kak

4 answer

Density of states for free electron confined to a volume

I'm confused on the difference in results I'm seeing for the density of states for a free electron (for example, a conduction electron in a metal). For one textbook (Kittel),...

Asked on 09/03/2021

1 answer

What is this one parameter subgroup of the Lie group Diff(R)?

I am interested in the time reparametrization. t is replaced by $tau$.See how the infinite dimentional lie group Diff(R) is introcuced.t is a real number of R....

Asked on 09/03/2021

1 answer

Analytic solution to the Kepler problem from position + velocity initial conditions

I am writing a javascript program (web page) that uses iterative simulation to show the motion and mechanics of a satellite in orbit around the earth. So far, using...

Asked on 09/02/2021 by RBarryYoung

1 answer

Ice formation in a cavity that was sealed at ambient condition and taken to space

I have a hardware with a cavity that was closed (welded) at ambient conditions (298K, 1 bar Pressure and 50% RH). The hardware was taken to space where the temperature...

Asked on 09/02/2021 by Manish Kumar Mishra

1 answer

What is the exact meaning of Lorentz invariance for a quantum scalar field?

In axiomatic QFT, the defining property of a scalar field $phi$ is that it does not change under a Lorentz transformation: that is, "If $U(Lambda)$ is the unitary...

Asked on 09/02/2021

2 answer

What happens when there is wobbly motion in General Relativity

I know for a fact that when an object starts spinning, it can be described as an inertial frame. For the sake of this question, let's consider a disc with...

Asked on 09/02/2021

1 answer

Calculate the distance from the axis beyond which the particles have slid off a rotating disk

A collection of small particles is distributed on the top surface of a disc that is rotating at 91 revolutions per second, about an axis, which is vertical. Some of...

Asked on 09/02/2021 by sadpwner

1 answer

Why the Vout vs. VR graph looks like an oval loop?

So we've performed an experiment about the resonance angular frequency and RLC circuits in the lab.I understand that the phase of voltage on the inductor and the voltage on...

Asked on 09/02/2021 by Ç.Eti

1 answer

Euler's Equation applied to Perfect Fluid

Consider this form of Euler's Equation:$$rho vec{a}=nabla cdot T+rho vec{f}$$Where: $rho$ is the density, $vec{a}$ is the acceleration, $T$ is Cauchy's Stress Tensor and...

Asked on 09/02/2021

1 answer

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