Barril e sonar: o que têm em comum

1. Passo 1. Barril — funciona como — Arco. Staves squeezed by hoops hold their shape by the same compression as the stones of an arch.
2. Passo 2. Arco — evoluiu para — Cúpula. A dome is an arch rotated around an axis.
3. Passo 3. Cúpula — faz parte de — Helmet. A protective shell.
4. Passo 4. Helmet — é feito de — Leather. Helmet liners and simple helmets were made of leather.
5. Passo 5. Leather — é material para — Submarine. It was covered with leather.
6. Passo 6. Submarine — tem como parte — Sonar. Underwater acoustics.

Abrir Evothings