Mirror and air conditioner: what they have in common

1. Step 1. Mirror — is part of — Periscope. Mirrors or prisms.
2. Step 2. Periscope — is part of — Submarine. A periscope.
3. Step 3. Submarine — has part — Lead–acid battery. Underwater, electric motors run on batteries.
4. Step 4. Lead–acid battery — is part of — Uninterruptible power supply. A battery.
5. Step 5. Uninterruptible power supply — is part of — Data centre. Backup power.
6. Step 6. Data centre — has part — Air conditioner. Cooling.

Open Evothings