Experiment of December 21, 2016:

The time to submit an answer is over. You can now view the solution of the experiment.

Solution video:

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Experiment:

Question:

What will happen to the boat when Ms. Santa puts a little washing-up liquid onto a spoon handle and drips the washing-up liquid very accurately into the slit of the boat?

A) It quickly moves backwards; this works as often as you like.

B) It quickly moves forwards; this works as often as you like.

C) It quickly moves backwards; this works only once or a couple of times.

D) It quickly moves forwards; this works only once or a couple of times.