Oobleck and Non-Newtonian Fluids

Dr. Boyd introduces non-Newtonian fluids by making Oobleck, a shear thickening fluid. The video explains viscosity, shear thickening, and shear thinning, using examples like ketchup. The hands-on activity involves mixing cornstarch and water to create Oobleck, demonstrating its unique properties when stress is applied. The video emphasizes understanding fluid behavior in a simple, engaging manner.

What materials are required to make Oobleck?

• Cornstarch, water, and a bowl

• Flour, milk, and a spoon

• Sugar, vinegar, and a cup

• Salt, oil, and a whisk

What is viscosity?

• The weight of a solid

• The thickness or stickiness of a fluid

• The color of a liquid

• The temperature of a fluid

Which of the following is a characteristic of a shear thickening fluid?

• Remains constant in viscosity

• Becomes more viscous under stress

• Changes color under stress

• Becomes less viscous under stress

What is an example of a shear thinning fluid?

• Water

• Oobleck

• Ketchup

• Honey

What happens to Oobleck when you apply a quick force to it?

• It becomes runny

• It evaporates

• It stiffens and behaves like a solid

• It changes color

How does Oobleck behave when no stress is applied?

• It becomes gaseous

• It hardens completely

• It flows like a liquid

• It remains solid

Why is Oobleck considered a non-Newtonian fluid?

• It is made from cornstarch

• It is a solid at room temperature

• It does not follow Newton's law of viscosity

• It changes color under light