Question

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

Answer 1

B

Step-by-step explanation:

• the vibrating string of piano

Answer 2

D

Step-by-step explanation:

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