Why Spheres Spin Differently in Bathtubs & Faucets

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Spheres in bathtubs spin due to the larger dimensions allowing even a small angular momentum to initiate motion, while in faucets, the water typically remains still unless agitated. The initial statement about differing spins is incorrect; angular momentum is the key factor. When water is left undisturbed, it generally does not spin. Introducing a swirl to the water can trigger spinning in both scenarios. The Coriolis force is not a significant factor in this context, and bathtubs in different regions do not exhibit differing behaviors.
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Why does a sphere in a bathtub vortex spin - but a sphere in a faucet remain still ?
 
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The statement is false. The question is: do you have angular momentum? If you leave the water to rest for an hour usually there is no spinning. If you give a little swirl to the water in the sink before you let it out, you can probably force it to start spinning.

Bathtubs have larger dimensions, you a smaller angular momentum of the water is enough. Oh and forget about the Coriolis force. Australian bathtubs are no different than European ones.
 

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