PeroK's latest activity

It looks to me like it's already a saturated market.

Because only the ratio ##q/p## determines ##b##.

Okay, that has got to be one of the coolest ways anyone has found Physics Forums. :welcome: Do note that speculative topics are...

Every measurement is itself an invariant. The observer could record the result and promulgate that round the universe (subject to...

This is tricky even without introducing the complexities of an evaporating black hole. "Crosses the horizon at a finite proper time...

I've heard this many times too, but I think it's an outdated and unproven view of chess. We're clear that chess is a finite game; it was...

That's a unique approach to learning!

Nothing. They are just different names for the same things. If you taught a class of students using those terms and a class of...

The confusion may be independent of the words. Choose whatever words you like and the conceptual difficulty remains. Using "invariant"...

Sorry, I should have made clear that not all naming choices are bad. And let's not derail the thread by discussing those that weren't...

I must admit I don't generally use the terms "action" and "reaction". But, "real" and "fictitious" make perfect sense to me. I never...

Let's hear your better words for displacement, velocity, speed, acceleration, force, mass, energy, momentum, torque, angular momentum...

Physists of the past have been brilliant at describing nature using math, but terrible at choosing the right words for it. Both naming...

As your drawing shows, the angle between the Sun's rays and the fly's velocity is 66°. The question is which trig function, sine or...

PS and, as you are at rest in your own reference frame, you have to add the same (*) fictitious force to yourself in order for Newton's...