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2025年9月24日 / Last updated : 2025年9月24日 桑子 研 Science

[No More Confusion!] The Ultimate Chemistry Recipe to Convert Mass Percent, Molarity, Normality (N), and ppm with Ease

This is Ken Kuwako, the Science Trainer. Every day is an experiment. Have you ever been following a recipe and wondered what “a pinch of salt” really means? In the world of chemistry, we have a similar situation with several ways to express “concentration,” and scientists choose the best one for the job. Today, let’s […]

2025年9月23日 / Last updated : 2025年9月23日 桑子 研 Science

Web App Oscilloscope ‘XXY OSCILLOSCOPE’ — A Game-Changer for Teaching Sound!

I’m Ken Kuwako, a science trainer. Every day is an experiment. Did you know that your voice has a unique “shape,” just like a fingerprint? Wouldn’t it be cool to see the invisible sounds of your laughter, a serious conversation, or your favorite song lyrics in real-time, just like a scene from a movie? If […]

2025年9月23日 / Last updated : 2025年9月23日 桑子 研 Science

From Kerosene Pump to Beating Heart! Hands-On Science Class to Feel the Cardiac Mechanism

I’m Ken Kuwako, a science trainer. Every day is an experiment! “Thump-thump, thump-thump…” Can you imagine this small organ, your heart, working tirelessly inside your chest, pumping an amount of blood equivalent to about 40 oil drums throughout your body in a single day? Yet, many middle school students find it hard to grasp what […]

2025年9月23日 / Last updated : 2025年9月23日 桑子 研 Science

The Science Behind Glass Tears! Experience the Shocking Secret of the ‘Dutch Tear’

I’m Ken Kuwako, a science trainer, and for me, every day’s an experiment! Today, I want to share a beautiful and bizarre experiment called Prince Rupert’s Drop that I did with my science club students. It’s truly fascinating how we can take a common material like glass and see it behave in ways that defy […]

2025年9月23日 / Last updated : 2025年9月23日 桑子 研 Science

Science at Minnie’s House!? The Magical Physics of the Volumatronics at Disneyland

I’m Ken Kuwako, a science trainer! Every day is an experiment! 【This article is also available as a radio broadcast!】 Tokyo Disneyland, a land of dreams and magic. Did you know that this place, where everyone smiles, actually hides many “seeds of science”? What might seem like pure magic at first glance reveals surprising mechanisms […]

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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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