Radio module and antenna and boiler: what they have in common

1. Step 1. Radio module and antenna — is part of — Space probe. Communication with Earth.
2. Step 2. Space probe — has part — Ion thruster. Ion thrusters (Dawn).
3. Step 3. Ion thruster — uses — Reaction force. Jet thrust.
4. Step 4. Reaction force — is used in — De Laval nozzle. It accelerates gas, creating thrust.
5. Step 5. De Laval nozzle — evolved from — Steam turbine. De Laval invented the nozzle for a steam turbine.
6. Step 6. Steam turbine — has part — Boiler. Steam from the boiler.

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