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2 votes
2 answers
127 views

Can we prove the Earth rotation with a disk mounted in its center on a frictionless axis?

Can somebody prove the rotation of Earth if it places an uniform disk with a hole in its the center on an axis and orient it paralelly to Sun ecliptical disk?Just assure himself that the disk on the ...
Krešimir Bradvica's user avatar
4 votes
6 answers
6k views

Air flight and Earth's rotation

I read a response asking why flights of equal distance east and west take roughly the same time (disregarding wind actions). I have trouble visualizing part of the answer; "the speed of the rotation ...
Luke.H's user avatar
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