{"id":63321,"date":"2026-05-12T04:20:37","date_gmt":"2026-05-11T19:20:37","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=63321"},"modified":"2026-05-12T04:20:37","modified_gmt":"2026-05-11T19:20:37","slug":"can-sugar-water-make-things-float-the-hidden-secrets-of-buoyancy-behind-conans-trick-and-the-dead-sea","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=63321&lang=en","title":{"rendered":"Can Sugar Water Make Things Float!? The Hidden Secrets of Buoyancy Behind Conan\u2019s Trick and the Dead Sea"},"content":{"rendered":"

I\u2019m science trainer Ken Kuwako. Every day is an experiment.<\/strong><\/span><\/p>\n

\"\"<\/p>\n

\u3010This article is also available as a radio talk!<\/a>\u3011<\/p>\n

\u201cWhy don\u2019t ships sink?\u201d
\n\u201cWhy does ice float on water?\u201d<\/p>\n

At some point as kids, we\u2019ve all wondered about questions like these. Surprisingly, the answers are hidden inside just two scientific ideas: density and buoyancy. Today, let\u2019s uncover the mystery together through fun experiments, everyday examples, and even tricks from famous manga stories.<\/p>\n

What Is Buoyancy? Archimedes\u2019 Brilliant Discovery<\/h3>\n

Remember the strange feeling when you jump into a swimming pool and suddenly feel lighter? That sensation is buoyancy in action.<\/p>\n

Whenever an object is placed in a liquid, the liquid pushes upward on it. This upward force is called buoyancy. According to Archimedes\u2019 principle, the strength of that force is equal to the weight of the liquid displaced by the object.<\/p>\n

The ancient Greek scientist Archimedes is said to have discovered this while taking a bath. Legend says he became so excited by the realization that he ran naked through the streets shouting, \u201cEureka!\u201d (\u201cI found it!\u201d). It remains one of the most famous stories in science history.<\/p>\n

Let\u2019s look at it a little more closely. Suppose an object has volume V and density \u03c1. The gravitational force acting on it can be written as \u03c1Vg (where g is gravitational acceleration). If the object is completely submerged in water with density \u03c1’, the buoyant force becomes \u03c1’Vg according to Archimedes\u2019 principle.<\/p>\n

\u6d6e\u529b\u306e\u516c\u5f0f\u306e\u6c42\u3081\u65b9\u30fb\u5c0e\u51fa\u65b9\u6cd5\uff08\u30a2\u30eb\u30ad\u30e1\u30c7\u30b9\u306e\u539f\u7406\uff09<\/a><\/p><\/blockquote>\n