Mortar (weapon) and transformer: what they have in common
- Step 1. Mortar (weapon) — is a kind of — Cannon. A gun.
- Step 2. Cannon — is part of — Ironclad. Artillery.
- Step 3. Ironclad — evolved into — Aircraft carrier. The first aircraft carriers were converted from battleships and cruisers.
- Step 4. Aircraft carrier — has part — Steam turbine. Turbines (powered by a reactor on nuclear carriers).
- Step 5. Steam turbine — is part of — Nuclear power plant. Steam turns the turbines — as at a thermal station.
- Step 6. Nuclear power plant — has part — Transformer. Transformers step up the voltage so the plant's power can travel far.