Why Spheres Spin Differently in Bathtubs & Faucets

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SUMMARY

The discussion clarifies that a sphere in a bathtub can spin due to the angular momentum of the water, while a sphere in a faucet typically remains still unless the water is initially swirled. The larger dimensions of bathtubs allow for smaller angular momentum to initiate spinning. The Coriolis force is irrelevant in this context, as bathtubs in Australia and Europe behave similarly regarding this phenomenon.

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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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