Spindle shaft and router: what they have in common

1. Step 1. Spindle shaft — is part of — Spindle. The axis on which the thread is wound.
2. Step 2. Spindle — uses — Angular momentum. Spinning the spindle twists the thread.
3. Step 3. Angular momentum — is used in — Gyroscope. The rotor keeps the direction of its axis.
4. Step 4. Gyroscope — is part of — Smartphone. A MEMS gyroscope detects the rotation of the phone.
5. Step 5. Smartphone — has part — Radio module and antenna. Connection to the cellular network, Wi-Fi, Bluetooth and satellite navigation.
6. Step 6. Radio module and antenna — is part of — Router. A Wi-Fi access point.

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