Unraveling Everyday Mysteries: Water Whirling and Tomato Juice Rings

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SUMMARY

This discussion addresses two everyday phenomena: the whirling motion of water when flushed and the formation of rings on a glass after drinking tomato juice. The whirling effect is attributed to the Coriolis effect and the design of toilet plumbing, which directs water in a circular motion. The rings on the glass are explained by the concept of surface tension and the adhesion of liquid to the glass, resulting in uneven distribution after each sip.

PREREQUISITES
  • Understanding of fluid dynamics
  • Basic knowledge of surface tension
  • Familiarity with the Coriolis effect
  • Concepts of adhesion and cohesion in liquids
NEXT STEPS
  • Research the Coriolis effect in fluid dynamics
  • Explore the principles of surface tension and its applications
  • Study the mechanics of toilet plumbing design
  • Investigate adhesion and cohesion in various liquids
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Students of physics, educators explaining fluid dynamics, and anyone curious about everyday scientific phenomena.

Joonasja
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Hi everyone!
I have two rather simple and everyday phenomenons that I can't explain.
1) Why does water whirl when you flush it down, why doesn't it go in a straight line?
2) When you're drinking tomato juice, then why are there rings on the glass (after every zip there remains some juice on the glass, but why isn't it "even" in every place but forms rings.)?
 
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Please show your attempt at these questions as per the guidelines.

Jared
 

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