Blowing Away Tissue Paper

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What type of experiment is this?

Experimental procedure and explanation:

• Float a tissue paper on the top of water and then blow at it with a strong breath. The tissue paper separates from the water surface and flies away.
• The tissue paper was sprayed in advance with a waterproof spray. The waterproof spray exhibited water repellency, causing numerous air bubbles to remain under the tissue paper. This made it easier for the tissue paper to separate from the water. Therefore, when the tissue was blown at with a strong breath, the tissue paper was blown away.

[Attention]	Some waterproof sprays also contain harmful components; therefore, be certain to apply the spray outdoors or in a well-ventilated area.
[Keywords]	surface tension, water repellency
[Related items]	Floating a 10-Yen Coin
[Reference]	Isao Imai, “Fluid Dynamics, Vol. I,” Shokabo, pp. 66–67. The Japan Society of Mechanical Engineers, “The Wonders of Flow (Nagare no Fushigi),” Kodansha Blue Backs, pp. 128–133. Ryozo Ishiwata, “Illustrated Fluid Dynamics Trivia (Zukai Zatsugaku Ryutai Rikigaku),” Natsume Publishing, pp. 214–215 and pp. 206–209.