Experiment of December 14, 2016:

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Solution video:

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What is the shape of the moving jet of air when Mr. Santa taps or presses very briefly, but with some force, on the plastic bottle?

A) A small, slow, spherical cloud.

B) A fast smoke ring.

C) A jet which gets wider and wider.

D) A jet which gets longer and longer.

Advice of the day:

Please do not forget to watch the solution videos (when you are logged in). For ten watched solution videos, you get one additional joker.