Blocks of ice and sonar: what they have in common

1. Step 1. Blocks of ice — is material for — Ice house. Blocks of ice cut in winter.
2. Step 2. Ice house — uses — Heat transfer. Thick walls and earth slow down heat transfer.
3. Step 3. Heat transfer — is used in — Combined heat and power plant. Waste heat goes to heating.
4. Step 4. Combined heat and power plant — has part — Steam turbine. Steam turns the turbine.
5. Step 5. Steam turbine — is part of — Destroyer. Turbines.
6. Step 6. Destroyer — has part — Sonar. Underwater acoustics.

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