Tuning fork prongs and rocket: what they have in common

1. Step 1. Tuning fork prongs — is part of — Tuning fork. Two vibrating tines.
2. Step 2. Tuning fork — is part of — Quartz clock. Quartz shaped like a tuning fork at 32,768 Hz.
3. Step 3. Quartz clock — is made of — Silica (sand). The resonator is a quartz crystal.
4. Step 4. Silica (sand) — is material for — Space Shuttle. The heat-shield tiles are silica fibre.
5. Step 5. Space Shuttle — has part — Solid rocket motor. Boosters.
6. Step 6. Solid rocket motor — evolved from — Rocket. Gunpowder rockets.

Open Evothings