TED-ED: Why is ketchup so hard to pour? - George Zaidan

The video explores the unique behavior of ketchup, a Non-Newtonian fluid, which behaves differently from typical Newtonian fluids like water. Ketchup's viscosity changes based on the force applied, making it both a solid and a liquid under different conditions. The video explains the science behind this behavior, including the role of tomato particles and the impact of time and force. It also provides practical tips for pouring ketchup effectively.

What is the main difference between Newtonian and Non-Newtonian fluids?

• Newtonian fluids change thickness with force.

• Non-Newtonian fluids do not change thickness with force.

• Non-Newtonian fluids respond linearly to force.

• Newtonian fluids respond linearly to force.

How does ketchup behave when a strong force is applied quickly?

• It does not flow.

• It becomes thinner.

• It remains solid.

• It becomes thicker.

What happens to ketchup when a weak force is applied for a long time?

• It evaporates.

• It becomes thicker.

• It starts to flow.

• It remains solid.

What is one possible explanation for ketchup flowing under a weak force over time?

• The particles evaporate.

• The particles become larger.

• The particles rearrange into small groups.

• The particles dissolve completely.

How can the presence of xanthan gum affect ketchup?

• It can change the flow behavior of ketchup.

• It has no effect on ketchup.

• It causes ketchup to solidify.

• It makes ketchup evaporate.