Doppler effect and air conditioner: what they have in common

1. Step 1. Doppler effect — is used in — Ultrasound scanner. Doppler imaging of blood flow.
2. Step 2. Ultrasound scanner — uses — Ultrasound. Ultrasound.
3. Step 3. Ultrasound — is used in — Nebulizer. Ultrasonic nebulizers.
4. Step 4. Nebulizer — has part — Compressor. A compressor.
5. Step 5. Compressor — is part of — Air conditioner. A compressor.

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