Electric arc and rocket: what they have in common

1. Step 1. Electric arc — is used in — Plasma. An arc is an example of plasma.
2. Step 2. Plasma — is used in — Ion thruster. An ionized gas.
3. Step 3. Ion thruster — uses — Reaction force. Jet thrust.
4. Step 4. Reaction force — is used in — Rocket. A rocket moves by reaction force.

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