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4. When a key on piano is pressed, a sound is heard. What produces this sound?
A. the vibrating key of the piano
B.
The Vibrating String Of Piano
C. the finger pressing the piano key
D. the air molecules inside the piano

Respuesta :

navneelram1

Answer:

D

Explanation:

since we press the key , air molecules ate presented and sound wave is formed what we hear.

kavyasri

Answer:

B

Explanation:

  • the vibrating string of piano