anuttarasammyak's latest activity

Einsteins seems just applied the general rule of variation for product H=ABC, i.e., $$\delta H = \delta A\ B\ C+A\ \delta B\ C+A\ B\...

In SR, proper time of the object in motion with velocity v(t) is given by $$\tau = \int_0^T \sqrt{1-\frac{v(t)^2}{c^2}}dt$$ where once...

I concur with Pallen's observations. MTW goes into the explicit geometric details of how to construct a proper frame of reference. And...

You use alphabet k to mean two different quantities i.e., spring constant and wave number, which cause the confusion.

Indeed. Next I survey my environment to construct my PFR which might not be defined unikely. That will be a tough work to do.

It seems odd to me too because I think Minkowski coordinate belongs to SR or IFR where we find no problems as for Proper FR.

A proper frame of reference (FR) that is inertial (IFR) does not depend on the observer’s location or size; the observer may be regarded...

Note that the English meaning of "proper" has drifted over time to mean "correct". In this context, though, it's being used in an older...

Your thought about two IFRs seems OK. What’s the problem?

Good! For simplicity and convenience, let’s temporarily choose ##t=0##. At ##t=0## we can use the total ##s## to see that ##y=0##. So...

@davLev Why we observe more electrons than positrons would become your question then.

The formula for the 2nd and the 3rd case is written as $$\frac{a^2+s^2-as(\sin\theta + \cos\theta)}{2 \sin\theta \cos\theta}$$ which is...

I worked out the overlap of the two squares as a function of angle. Given ##a## is the half edge length of the original square and...

The answers for the first case and the 4th case are symmetric for exchange of s and a. May we expect the same for the 2nd and the 3rd...

The electromagnetic repulsive force is an obstacle that must be overcome to achieve nuclear fusion. This condition is satisfied in the...