Understanding the Marangoni Effect and Soap-Powered Boats

What is the primary cause of the Marangoni Effect?

• Temperature differences

• Surface tension differences

• Pressure differences

• Density differences

In the Marangoni Effect, fluid flows from areas of ______ surface tension to areas of ______ surface tension.

• higher; lower

• lower; higher

• equal; equal

• none; none

What happens to pepper flakes when soap is added to water?

• They sink to the bottom

• They move towards the soap

• They move away from the soap

• They dissolve in the water

How does the soap-powered boat move forward?

• By the soap dissolving in water

• By the wind pushing it

• By fluid ejection due to surface tension differences

• By the weight of the boat

Which law explains the propulsion of the soap-powered boat?

• Newton's Second Law

• Newton's First Law

• Newton's Third Law

• Law of Conservation of Energy