Billiards and greenhouse: what they have in common

1. Step 1. Billiards — uses — Newton’s laws. Collisions of balls.
2. Step 2. Newton’s laws — is used in — Pendulum. The swing is described by Newtonian mechanics.
3. Step 3. Pendulum — is part of — Tower clock. A pendulum (since the 17th century).
4. Step 4. Tower clock — is part of — Gothic cathedral. A tower clock.
5. Step 5. Gothic cathedral — has part — Window glass. Stained glass.
6. Step 6. Window glass — is part of — Greenhouse. It lets light in and holds heat.

Open Evothings