Quick Answer: Ethylene is a natural gaseous plant hormone that acts like a “ripening signal” for many fruits, triggering color changes, softening, sweetness,…

Quick Answer: Thermocouples are rugged temperature sensors that work by generating a voltage when two different metals meet at different temperatures. They’re inexpensive,…

Quick Answer: Metals glow when they’re heated because their atoms vibrate more intensely, releasing thermal radiation. As the temperature rises, the peak wavelength…

Quick Answer: LEDs, or light-emitting diodes, turn electricity directly into light using a semiconductor process called electroluminescence. When electrons and holes meet in…

Quick Answer: Adhesive tape clings to surfaces thanks to a teamwork of forces—tack for quick grab, cohesion for internal strength, and adhesion for…