Subwoofer and chisel: what they have in common

1. Step 1. Subwoofer — has part — Amplifier. A built-in amplifier.
2. Step 2. Amplifier — is part of — Public address system. Amplifiers.
3. Step 3. Public address system — is part of — Stadium. Sound.
4. Step 4. Stadium — has part — Street light. Floodlights.
5. Step 5. Street light — is part of — Tunnel. Lighting.
6. Step 6. Tunnel — uses — Chisel. Hezekiah’s Tunnel was cut by hand with chisels.

Open Evothings