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?
Answer
A
The soap increased the viscosity of the water behind the boat, allowing the water in front of the boat to flow more easily.
B
The soap reduced the surface tension behind the boat, causing both water molecules and the boat to be pulled forward.
C
The soap increased the kinetic energy of the water molecules behind the boat, causing both the molecules and the boat to move forward.
D
The soap formed an immiscible layer on the water, causing the soap to spread out and push the boat forward.