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When a toilet is flushed or a sink is drained, the water
Chapter 6, Problem 13(choose chapter or problem)
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?
Questions & Answers
QUESTION:
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?
ANSWER:
Step 1 of 3
When water flows through a hole in a drain, bath tub, or a toilet, it spirals outwards. As stated in the question, the rotation of water will depend upon the shape and size of the drain and also how water is introduced.