Jia girl likes coffee and becomes the champion of science exhibition.

Jia female students Luo Yilin (second from left to right), Hong Ru and Chen Yi, guided by their teachers Jiang Songcheng (left) and Li Mingxiang (right), won the Science Exhibition Award and gave the best gift to retired headmaster Zheng Shengwen (back row, left).

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Drink coffee and drink the champion of science exhibition! Luo Yilin, a sophomore in the excellent math and science class in Chiayi Girl Middle School, likes to drink coffee. research with classmates Hong Ru and Chen Yi found that coffee with milk bubbles is less likely to spill because of the friction between the foam and the cup wall, which exerts the damping effect and verifies the physical fluid mechanics. won this year's Science Exhibition Agriculture and Food Champion and Best Creative Award.

Luo Yilin often drinks coffee with milk, and her mother likes to drink black coffee. she found that coffee with milk will not spill over in the process of delivery. there is only relevant research in the United States. She and Hong Ru, Chen Yi, directed by physics teacher Jiang Songcheng and chemistry teacher Li Mingxiang, spent a year drinking many brands and countless fresh milk, and found that the milk foam added coffee about 1.5 centimeters thick. The amplitude of the shock can be reduced by 57%, that is, the damping effect of milk foam on the liquid.

Jiang Songcheng said that the damping effect comes from the friction between the milk foam and the wall of the cup, and the greater the friction, the less likely it will be to splash out. From doing research on small things in life to verifying the theory of fluid mechanics, it is not easy to win the first place from being questioned by the review to being favored.

Luo Yilin said that the damping effect varies with the oil content and sugar content of fresh milk, and the damping effect of high fat content and dense fructose is more obvious.

The students said that the most difficult part of the research process was that there were no oscillators to do experiments. Later, they drew designs, and teacher DIY of Jiangsong, who knew how to do carpentry, made oscillators that could vibrate vertically and shake milk bubbles horizontally.

Zheng Shengwen, headmaster Zheng Shengwen, who retired today, went to work on the last day yesterday and named the vibrator "Jiannu". She was very happy that the teacher and student team gave him the best gift. At the same time, Mr. Jiang Songcheng, a famous teacher in the science exhibition, was about to transfer to the post of high engineering in Kaohsiung. I also wish him a great show of talent.