Bufofrog

Hopefully that knowledge was INvaluable!😉

It's up to you to decide, this is your fantasy.

Is this a joke, because I haven't heard this one. I don't know, what happens? Edited: Wait! I got it, a group of zealots break through the door and yell, "No one expects the Spanish Inquisition!"

The 2 is only there because the circumference of a circle is pi*D, and D = 2*r

It is difficult to say, because of the obvious language barrier, but I would say, yes.

Interesting logic. Imagine I could say abra-cadabra and I could turn a tea cup into a mouse. I think that proves magic is real...

Oh, of course.

Dinosaurs could certainly live in many areas of the earth today. Birds are direct descendants of feathered dinosaurs, so birds are actually the only remaining dinosaurs.

Uh, OK, it certainty seems that large animals and extinction events was the crux of the discussion to me.

Because that is what is discussed in the OP. Large not really a number...

Again I have to point out that large dinosaurs were around for more than 150 million years, and large mammals have been around for tens of millions of years.

Do you have any evidence to support this? Large dinosaurs existed for more than 150 million years with no mass extinctions. Large mammals have existed for tens of millions of years with no mass extinctions. I do not think the evidence supports your proposition. It is certainly possible that large animals are more susceptible to dying off during an extinction event than small animals. I don't think that large animals cause extinction events (with the possible exception of humans).

I assume if you tried to anneal it, that the metal would devitrify. Is the metal still ductile or is it brittle, since there are no crystal grains?

There is no theory I know of that even postulates that. Cross posted with Swansont.

Along those same lines, many people don't realize that those beautiful pictures of nebulae, like the Orion nebula, are not something that a person could see no matter their location in space. Even if you were relatively close to the Orion nebula it would just look like a diffuse haziness in the night sky. Time lapsed and stacking of images makes the really nice pictures.

Correct. As Sensei pointed out the net charge is zero. At an rate electrical charge has nothing to do directly with mass-energy equivalency.

-1 for the dishonestly quoting joigus, reported to boot since this is a violation of site rules. Really bad form, kartazion!

I still would like to know why 'it would it be impossible to reveal to the general public'?

Why couldn't it be revealed?

Read the book.

What do you mean? There is no virus? The covid-19 virus has been misidentified?

This a good thing. Being wrong is not bad but refusing to admit you are wrong is terrible. All the greatest physicist and scientists were wrong about many things, and learned from their errors. There is no doubt you have learned a lot of mechanics in this thread, I know I have. Thanks for the discussion.

I have been following this thread with interest and I would like thank the participants. I never really got the idea of a fictitious force, but thanks to this thread the concept now seems clear to me. It also looks like John2020 has long ago reached the point where he should have admitted his idea was wrong, if he was ever going to.

You changed the scenario to eliminate acceleration so the only thing we had to work with is 2 inertial frames, so my answer was based on that. Maybe if you stop trying to complicate or change the scenario it would be less confusing for you. You said: Now, if you keep in mind that the situation must be so that you cannot know who is the "moving" and who is the "at rest", you get the confusion I struggle with. This is wrong! We know exactly who has accelerated to a new reference frame and who stayed in the same reference (who is the "moving" and who is the "at rest") We know the rocket accelerated and the earth did not. An astronaut on the rocket would almost lose consciousness from the acceleration and the earth would feel no acceleration. The rocket is 'moving' and the earth is not*. This is based on the origin of the coordinate system being starting frame of the rocket on the earth. Do you understand this? If you don't understand, then please don't say you do!

Skeptic and a helluva magician.