11. How do sounds travel through air?
A. very fast
C. in jumping motion
B. very slowly
D. in random manner
12. How does the vibration of the particles behave when
sounds travel through solids?
A. It occurs fast.
B. It occurs very slowly.
C. It occurs moderately.
D. It cannot be determined.
13. In which medium can sound wave travel faster
A. Solids
C. Gases
B. Liquids
D. All of these
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11.D.
12.A.
13.D.
Note:
NOT SURE