Science: Of Everyday Things

That foam on top is a CO2 emulsion, a byproduct of the roasting process trapped inside the bean. 2. The Physics of the Microwave

Why does a vegetable make you cry? It’s a chemical defense mechanism. SCIENCE OF EVERYDAY THINGS

The screen is covered with a transparent conductive layer (usually Indium Tin Oxide). That foam on top is a CO2 emulsion,

These molecules flip back and forth billions of times per second to align with the field. This rapid motion creates friction, which generates the heat that cooks your leftovers. 3. The Biology of Tears (Cutting Onions) It’s a chemical defense mechanism

This reacts to form a gas called syn-propanethial-S-oxide . When this gas hits the water layer on your eyeballs, it turns into a mild sulfuric acid. Your brain then triggers "reflex tears" to flush the irritant away. 4. The Engineering of a Touchscreen

Friction between your shoe and the floor prevents your foot from sliding. On ice, the friction coefficient drops drastically, which is why your "equal and opposite reaction" results in a fall rather than a step.