How does it work?
How does it work?
Concrete answers to how things work under the hood – explained step by step, no fluff.
How does it work?Everyday Technology
How does a vacuum flask work?
A vacuum flask prevents heat from entering or leaving by stopping the three modes of heat transfer: conduction, convection, and radiation. A vacuum between the double walls leaves virtually no air molecules to conduct or convey heat. A reflective coating reduces thermal radiation, while a tight-fitting stopper minimizes air movement at the neck.
4 min
How does it work?Everyday Technology
How does a zipper work?
A zipper works by moving a slider along two fabric tapes lined with metal or plastic teeth. The slider's internal Y-shaped channel angles and forces the opposing teeth to interlock when pulled in one direction, and separates them when moved in the opposite direction.
3 min