If the version you heard had Archimedes finding the crown to be pure gold, then there are at least 2 versions of the story being told, but I have never heard that the crown was found to be pure gold. Just curious, where and when did you hear that version?Noax wrote:I heard that the crown was found to be pure gold, and no execution. Same story, but different ending. Was I told the story wrong? Too PC of a school to describe an execution, but it was OK to give us an image of Archimedes running naked down the road?
The balloon in the car thing is also buoyancy. It is an illustration of one of the initial thought experiments for general relativity. Einstein stated that there was no local experiment that could differentiate gravity from acceleration. Hence, a sealed/soundproofed car with the windows painted black and the balloon coming to the windshield: Is the car accelerating or it just parked pointing uphill? Einstein said you can't tell the difference.
Yes, I wanted to include buoyancy as one of the factors in the movement of the balloon, but I couldn't remember it when I wrote the post. Thankyou. Yes I know it's mentioned in the post right before mine, just a bit of brain fade, it happens when you get old.