Answer
SURFACE TENSION
表面張力
WINDOW QUESTION · ANSWERSTEAM SQUAD
The question
WHAT PROPERTY LETS THE WATER AT THE RIM ACT LIKE A FILM AND SUPPORT THE CARD?
讓杯口的水像薄膜一樣托住卡片的性質叫什麼？
Why it works
WATER MOLECULES ATTRACT ONE ANOTHER, FORMING A SURFACE THAT SUPPORTS THE CARD
水分子彼此吸引，在杯口形成能托住卡片和人偶的表面
See it in action · WATER SURFACE TENSION
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