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Physics : Recent Questions and Answers (Page 759)

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

Properties of orbit type diagrams

For fun, I created a 3d gravity simulation and colored each $(x,y)$ coordinate blue or green if a light mass put at that location would collide - within some...

Asked on 12/07/2020 by 2080

0 answer

Lagrangian for a series of $N$ one-dimensional coupled oscillators

The Problem I have been given the following Lagrangian of a series of $N$ one-dimensional coupled oscillators, with distance a. I have also been given the boundary conditions: ...

Asked on 12/07/2020 by George Dixon

0 answer

How to calculate the strength ("space force") of dark matter within galaxies?

Let's first have a look at the observed speed within galaxies (source): On the left side...

Asked on 12/07/2020 by Marcus

1 answer

Relative angular velocity of point with respect to another point

What is relative angular velocity of one point, say A, with respect to another point, say B? Both the points lie on the same rigid body which is rotating with...

Asked on 12/07/2020 by dark_prince

2 answer

If 2 spaceships left Earth for the galactic centre, travelling near the speed of light, but they left an hour apart, would they arrive an hour apart?

If a spaceship left Earth for the galactic center at 3pm one day, traveling at extremely close to the speed of light (say 99.9999999%), then a second spaceship left at...

Asked on 12/07/2020

1 answer

Blocks and pulleys problem with friction - the condition for sliding

I encountered a problem with blocks and pulleys, which I'm not sure about. The diagrams I've drawn are given below. We need to find the minimal mass $M$ of...

Asked on 12/07/2020 by Yuriy S

1 answer

Prism, Dispersion and Deviation

A very straightforward question-Is it possible to have no dispersion and no deviation for a combination of prisms? And by prisms, I mean, a triangular one, not a glass...

Asked on 12/07/2020

0 answer

On a fixed beam, which force induces a counterclockwise torque

Given this situation ($P$ is the point where the beam is fixed), which force induces a torque that is counterclockwise? ...

Asked on 12/07/2020 by zokilokipoki

1 answer

Why is the Planck constant an exact number with defined value?

I found here that the Planck constant is defined as an exact number: $6.626 070 15times10^{−34} mathrm{J/Hz}$. How could this be done? Shouldn't it be a...

Asked on 12/07/2020

3 answer

Can lightly-ionized atoms be accelerated to relativistic speeds with current technology?

I know there're lots of various particle accelerators, which can accelerate particles to TeV's of energy, but it seems they all work on electrons or nuclei or other elementary or...

Asked on 12/07/2020

3 answer

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