Cable car and dewar flask: what they have in common

1. Step 1. Cable car — has part — Wire rope. A cable.
2. Step 2. Wire rope — is part of — Mine hoist. Mine ropes were the first use of wire rope.
3. Step 3. Mine hoist — is part of — Coal mine. Hoisting.
4. Step 4. Coal mine — is used in — Newcomen engine. Pumping water out of mines.
5. Step 5. Newcomen engine — uses — Vacuum. Condensing the steam creates a vacuum under the piston.
6. Step 6. Vacuum — is used in — Dewar flask. A vacuum.

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