The phenomenon is observed in tornadoes where the air spins with a great speed causing so much damage. Can there be any experiment that can be performed to make the air spin in clockwise or counterclockwise direction?


Almost all tornadoes rotate in the direction of cyclones: anti-clockwise on the Northern hemisphere. But a few percent are the other way around (clockwise on the Northern hemisphere). Because sometimes the rotational moment of vortex of the air where it forms (at a much smaller scale than an ordinary low-pressure system) happens to be the other way around. https://en.wikipedia.org/wiki/Anticyclonic_tornado

  • $\begingroup$ this answer does not give a reasoning. $\endgroup$ – AHB Sep 9 '17 at 18:06
  • $\begingroup$ @AHB I supposed people here would know about conservation of angular momentum. Difficult to make the air spin - it already does. On a large scale always in the direction of the Earth's rotation. $\endgroup$ – Pieter Sep 9 '17 at 20:46
  • $\begingroup$ In your answer, you just said some tornadoes are clockwise and some happen to be anti-clockwise. The OP probably knew this fact. $\endgroup$ – AHB Sep 10 '17 at 11:58

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