As I was taking a shower today and saw the water go down the drain, I was mindful of the way in which the water drained. It moved linearly, until it approached the drain, where it acquired a rotational movement. I was mindful that this is what Dr Placek was taking about in class today. This phenomenon happens because even though the water wants to move linearly, in the end it will start to rotate due to the Earth's rotation. An interesting fact is that water rotates in different directions in the Northern and in the Southern hemisphere.
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