Television set and watt steam engine: what they have in common

1. Step 1. Television set — has part — Cathode-ray tube. A picture tube.
2. Step 2. Cathode-ray tube — uses — Vacuum. Inside is a vacuum.
3. Step 3. Vacuum — is used in — Newcomen engine. Condensing the steam creates a vacuum under the piston.
4. Step 4. Newcomen engine — evolved into — Watt steam engine. Watt improved Newcomen’s engine.

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