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2025年10月19日 / Last updated : 2025年10月19日 桑子 研 Science

Why Does a Motor Keep Spinning? Unraveling Fleming’s Law and the Secret of the Commutator with Digital 3D and Papercraft!

I’m Ken Kuwako, a Science Trainer. Every day is an experiment. How many “motors” do you think are around you? Fans, washing machines, smartphone vibrations, even train wheels… Our lives are overflowing with the power to “rotate” things. But if someone asks you, “Why does electricity make things spin?” it can be a tricky question, […]

2025年10月19日 / Last updated : 2025年10月19日 桑子 研 Science

The $20 Science Breakthrough: Prove Light is a Wave with a Paper Cup!

I’m Ken Kuwako, a Science Trainer. Every day is an experiment. “Light travels in a straight line.” The sun’s light and a flashlight beam certainly look like they do, right? But what if you could easily see the “proof that light is a wave” using only items you have at home? Wouldn’t that be astonishing? […]

2025年10月19日 / Last updated : 2025年10月19日 桑子 研 Science

“What’s a Longitudinal Wave?” Explained Instantly! Learn the Basics of Waves and the Secrets Behind Japan’s Earthquake Alerts with a Spring!

I’m Ken Kuwako, your Science Trainer. Every day is an experiment! Return to Special Page Doable with a Dime-Store Toy! The Longitudinal Wave Science Experiment that Captivates Students “You can hear sound, but have you ever seen what it actually looks like?” “We hear about ‘P-waves’ in earthquake news. They say it’s the small tremor […]

2025年10月18日 / Last updated : 2025年10月18日 桑子 研 Science

The Earthquake Experiment: Watch Your Desk Turn to Quicksand!

I’m Ken Kuwako, a Science Trainer. Every day is an experiment. What if the ground you’re standing on suddenly turned into a wobbly, pudding-like liquid? This is ‘Liquefaction,’ a phenomenon you hear about in earthquake news. The idea of the ground turning into a liquid sounds like something out of an sci-fi movie, but it’s […]

2025年10月18日 / Last updated : 2025年10月18日 桑子 研 Science

It’s Not Magic! The Science Behind the Balloon That Bends Water (Static Electricity Experiment)

Hi, I’m Ken Kuwako, your Science Trainer. Every day is an experiment. Static electricity is everywhere—that invisible yet definitely present mysterious force: the crackle when you take off a sweater in winter, the shock when you touch a doorknob! But did you know this static electricity has the power to manipulate water, almost like magic? […]

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運営者: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。理科教師として勤務する傍ら、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
I want to share the fun, wonder, and excitement of science with as many people as possible. In addition to my work as a science teacher, I also work as a "Science Trainer," providing scientific supervision for and appearing on TV programs, holding hands-on science workshops, and writing science books.

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