Dumbbell collars and radio: what they have in common

1. Step 1. Dumbbell collars — is part of — Dumbbell. They secure the discs.
2. Step 2. Dumbbell — uses — Universal gravitation. Weight.
3. Step 3. Universal gravitation — is used in — Orbital motion. Gravity sets the orbit.
4. Step 4. Orbital motion — is used in — Artificial satellite. It moves in orbit.
5. Step 5. Artificial satellite — includes — Sputnik 1. The first satellite.
6. Step 6. Sputnik 1 — has part — Radio. It sent out a “beep-beep” radio signal.

Open Evothings