Carla makes a small cardboard boat and floats it in a tub of water. When she adds a drop of dish soap behind the boat, the boat moves forward.

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03-05-2016
Chemistry

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Carla makes a small cardboard boat and floats it in a tub of water. When she adds a drop of dish soap behind the boat, the boat moves forward.

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Аноним Аноним · Answer 1 · 2016-05-10T10:48:51+02:00

I'm assuming that this experiment is to make the boat move with the soap? If it is, then I'll just explain how it works. What is behind the movement of the boat would be surface tension. Surface tension messes up the movement of the water molecules and attracts them, making the surface tension behind the boat decrease. Since water molecules move towards higher surface tension, then this is why the boat moves forward.

mystickarma09 mystickarma09 · Answer 2 · 2021-01-25T00:03:38+01:00

I am unsure if this is correct (especially since I'm answering very late), but I believe this is part of a question. This must be the full question:

Carla makes a small cardboard boat and floats it in a tub of water. When she adds a drop of dish soap behind the boat, the boat moves forward.

Which statement best explains what happened?

O The soap increased the viscosity of the water behind the boat, allowing the water in front of the boat to flow more easily.

O The soap reduced the surface tension behind the boat, causing both water molecules and the boat to be pulled forward.

O The soap increased the kinetic energy of the water molecules behind the boat, causing both the molecules and the boat to move forward.

O The soap formed an immiscible layer on the water, causing the soap to spread out and push the boat forward.

The answer to this is The soap reduced the surface tension behind the boat, causing both water molecules and the boat to be pulled forward. (2nd option).