I’m Ken Kuwako, the Science Trainer. Every day is an experiment. How High Can You Hear? Discover the Surprising Limits of Human Hearing You may think you’re hearing every sound around you—but what if some sounds have already slipped beyond the reach of your ears? This time, I used a smartphone app to test just […]

I’m Ken Kuwako, the Science Trainer. Every day is an experiment. Why Do Guitar Strings Vibrate in That Characteristic Shape? When you strum a guitar, what exactly are the strings doing? It turns out they’re not simply moving back and forth. At certain frequencies, something remarkable happens: the wave seems to freeze in place. This […]

I’m Ken Kuwako, the Science Trainer. Every day is an experiment. “What is the single most important equation in high school physics?” If someone asked you that question, how would you answer? Some might point to the famous equation associated with Einstein’s theory of relativity, while others might choose an equation representing the conservation of […]

I’m Ken Kuwako, the Science Trainer. Every day is an experiment. Experience Precession with an Earth Gyroscope! Have you ever wondered why a spinning top doesn’t simply fall over? It’s just spinning, yet somehow it stays upright. Once you discover the reason, you might find yourself thinking, “Physics is actually amazing!” Today, I used an […]

I’m Ken Kuwako, the Science Trainer. Every day is an experiment. “What exactly is flowing when we talk about electric current?” How would you answer that question? It’s easy to repeat the definition from a textbook. But the moment you can explain it in your own words, using your own model, that’s when true understanding […]