Question

b. Harmonica
C. Dholak
d. Piano
1. A sound is produced because of
(vibrations/molecules).
(Music/Sound) is our basic means of communication.
3. Sound needs a
— (source/medium) to travel in.
4. The unit of frequency is
(hertz/seconds)
5. Time period is measured in
(hertz/seconds).
2.
B. Fill in the blanks with the correct words.​

Answer 1

Answer:

1 sound produce by vibration

3 sound needs a medium to travel

4.Unit of frequency is Hertz

5.time period is measured in second s