Question

Choose the correct alternative:
1. The sounds which cannot be heard unless we listen attentively are
(A) loud
(B) soft (C) musical
(D) unpleasant
2. The transmission of sound is fastest in
(A) vacuum
(B) air
(C) liquids
(D) solids
3. The science of sound is called
(A) decibel
(B) acoustics
(C) optics
(D) noise
4. The vibration of the vocal cords in our
(A) voice box
(B) trachea
produces sound.
(D) ear
(C) eardrums​

Answer 1

Answer:

1. a gaya

2.ka 3haa

3.ka bhaa

4.ka chaa

Answer 2

Answer:

unpleasant

vaccum

acoustic

voice box