When a toilet is flushed or a sink is drained, the water (and other material) begins to
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When a toilet is flushed or a sink is drained, the water (and other material) begins to rotate about the drain on the way down. Assuming no initial rotation and a flow initially directly straight toward the drain, explain what causes the rotation and which direction it has in the northern hemisphere. (Note that this is a small effect and in most toilets the rotation is caused by directional water jets.) Would the direction of rotation reverse if water were forced up the drain?
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The phenomenon youre describing where water starts to rotate as it flows down a drain is commonly kn...View the full answer
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