Skate blade e electrical telegraph: o que têm em comum

1. Passo 1. Skate blade — faz parte de — Ice skates. A steel blade.
2. Passo 2. Ice skates — é feito de — Osso. The first skates were horse bones with a polished side.
3. Passo 3. Osso — é material para — Flauta. The oldest flutes (Hohle Fels) were carved from bird bone and ivory.
4. Passo 4. Flauta — utiliza — Sound wave. Sound.
5. Passo 5. Sound wave — é utilizado em — Phonograph. It records sound vibrations as a groove.
6. Passo 6. Phonograph — foi inspirado por — Electrical telegraph. Edison came to the phonograph while working on recording telegraph and telephone signals.

Abrir Evothings