Double glass walls and bicycle: what they have in common

1. Step 1. Double glass walls — is part of — Dewar flask. Two bulbs, one inside the other.
2. Step 2. Dewar flask — uses — Vacuum. A vacuum.
3. Step 3. Vacuum — is used in — LIGO. 4 km vacuum tubes.
4. Step 4. LIGO — has part — Base isolation. The suspension damps ground vibrations.
5. Step 5. Base isolation — has part — Ball bearing. Friction pendulum bearings.
6. Step 6. Ball bearing — is part of — Bicycle. Ball bearings in the hubs and bottom bracket let the wheels and pedals spin easily.

Open Evothings