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2025年12月27日 / Last updated : 2025年12月27日 桑子 研 Science

【Quiz】Which Is Heavier After the Cut? A Carrot at the Balance Point! – Exploring Torque with Vegetables

I’m Ken Kuwako, your Science Trainer. Every day is an experiment! Sometimes, our intuition gets “tricked” by the laws of physics. For instance, imagine a single carrot perfectly balanced on a string. If you were to cut that carrot right at the balancing point, wouldn’t you think both sides would weigh the same? Surprisingly, this […]

2025年12月26日 / Last updated : 2025年12月26日 桑子 研 Science

Visualizing Physics with a Flying Hammer! Revealing the Beautiful Path of the Center of Mass Using a Smartphone App

I am Ken Kuwako, your Science Trainer. Every day is an experiment! Toss the Mallet! Channel Your Inner Hammer Bro! The Era of Easy Strobe Photography is Here! Have you ever seen a strobe photograph? If you open a science textbook, you will likely find pages showing a ball flying in a perfect arc or […]

2025年12月25日 / Last updated : 2025年12月25日 桑子 研 Science

When Your Fridge Becomes a Lab: The Fascinating World of Standing Waves Drawn with Springs and Magnets

I’m Ken Kuwako, your science trainer. Every day is an experiment! Whether it is the beautiful melody of a guitarist at a concert or the soothing sound of someone singing in the shower, invisible waves are hidden behind every sound we hear. Wouldn’t it be exciting if you could create a mysterious world where those […]

2025年12月24日 / Last updated : 2025年12月24日 桑子 研 Science

Just Stack It and Electricity Flows! The Burger-Style Voltaic Battery and the Drama of Redox Reactions

I’m Ken Kuwako, your science trainer. Every day is an experiment! A few drops of liquid, and a stationary propeller suddenly springs to life, spinning with incredible energy. It feels like magic, but this is the very foundation of the “battery”—a discovery by Italian physicist Alessandro Volta in the late 18th century that forever changed […]

2025年12月23日 / Last updated : 2025年12月23日 桑子 研 Science

What Happens When Copper and Zinc Meet Hydrochloric Acid? A “Personality Test” of Metals You Should Know Before Battery Experiments

I’m Ken Kuwako, your science trainer. Every day is an experiment! In 9th-grade science, there is a particular unit where many students struggle, yet simultaneously find themselves captivated. That unit is “How Batteries Work.” We use smartphones and remote controls every day without a second thought. We know they run on batteries, but if someone […]

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運営:桑子研(くわこ けん)
科学の楽しさや不思議、感動を多くの人に届けていきたい。サイエンストレーナーとしてテレビ番組の科学監修・出演、実験教室、科学本執筆なども行っています。

Author: Ken Kuwako
My mission is to share the joy, wonder, and excitement of science with as many people as possible. As a Science Trainer, I stay busy supervising and appearing on science-themed TV programs, hosting hands-on experiment workshops, and authoring science books.

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