How Fluid Can Climb Upward! SLIME EXPERIMENT | Summary and Q&A

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October 12, 2018
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Physics Girl
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How Fluid Can Climb Upward! SLIME EXPERIMENT

TL;DR

Discover the fascinating Weissenberg Effect and learn about non-Newtonian fluids through colorful science experiments.

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Key Insights

  • πŸ—ΊοΈ The Weissenberg Effect is a fascinating phenomenon where a spinning rod causes a non-Newtonian fluid to travel up the rod.
  • ❓ Non-Newtonian fluids, like slime, have unique properties such as viscoelasticity and shear thickening, which contribute to the Weissenberg Effect.
  • πŸ˜₯ The Weissenberg Effect can be visualized by creating different colors of slime and using a spinning rod to draw the fluid up from the meeting point of the colors.
  • πŸ…°οΈ Understanding the Weissenberg Effect helps to explore fluid dynamics and the behavior of different types of fluids.
  • πŸ§‘β€πŸ­ By experimenting with variations in the slime recipe and controlling factors like the amount of Borax and glue, the extent of the Weissenberg Effect can be observed and analyzed.
  • πŸ€— Science experiments like the Weissenberg Effect with non-Newtonian fluids provide an engaging and hands-on way to explore scientific concepts.
  • 🧑 Curiosity Stream is a subscription streaming service offering a range of documentaries and nonfiction titles, including educational content related to physics and science.

Transcript

DIANA: Thanks to Curiosity Stream for supporting PBS Digital Studios. Hey, I'm Diana. You're watching "Physics Girl," and a video that I really like to make is a bunch of different science experiments that you can try at home. So we bought all the materials for like six different experiments, which is a lot of milk in my fridge that says do not dri... Read More

Questions & Answers

Q: What is the Weissenberg Effect?

The Weissenberg Effect is an unusual behavior observed in fluids, where a spinning rod causes the fluid to travel up the rod. It occurs in non-Newtonian fluids with viscoelasticity and shear thickening properties.

Q: How does the Weissenberg Effect work?

When a fluid with viscoelasticity is spun, it creates tension that tightens around itself. This inward force pushes the inner fluid up, leading to the upward motion observed in the Weissenberg Effect.

Q: Can the Weissenberg Effect be observed with all fluids?

No, the Weissenberg Effect is specific to non-Newtonian fluids. Newtonian fluids, like water, do not display this behavior. The elasticity and shear thickening properties of non-Newtonian fluids, such as slime, are essential for the Weissenberg Effect to occur.

Q: How can the Weissenberg Effect be demonstrated at home?

To recreate the Weissenberg Effect, make a non-Newtonian fluid like slime using a mixture of water, PVA glue, Borax, and optional additives like food coloring. Spin a rod slowly in the slime to observe the upward motion.

Summary & Key Takeaways

  • The Weissenberg Effect occurs when a thin rod is spun in a fluid with specific properties, causing the fluid to travel up the rod.

  • This effect is observed in non-Newtonian fluids, such as slime, which have unique viscoelasticity and shear thickening properties.

  • By creating different colors of slime and using a spinning rod, the fluid's movement and the Weissenberg Effect can be visualized.

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