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December 2025

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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 […]

2025年12月22日 / Last updated : 2025年12月22日 桑子 研 Science

Unmask the Secrets of Vegetable Colors! The Amazing “Rainbow Test Tubes” Experiment with Purple Cabbage

I’m Ken Kuwako, your science trainer. Every day is an experiment! Take a look at the red cabbage in your local grocery store. It might look like just another vegetable, but did you know it’s actually hiding a secret source of magic ink? Today, I’m going to show you how to use this humble cabbage […]

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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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