Question

1. Fill in the blanks.
a.
When a metal bell rings, the first vibration takes place in
b. Vibrations cannot travel in ..........................
Pon......... musical instrument can be made with a ball and a string. .
d. The rapid to and fro or up and down movement are known as
The time taken by metal bob to complete one oscillation is called its ......
C.
e.​

Answer 1

Answer:

b gases

d oscillatory motion