Notifications
Clear all
Sound
1
Posts
2
Users
1
Likes
518
Views
0
10/05/2021 2:10 pm
Topic starter
Take a plastic or tin can. Cut its ends. Stretch a piece of rubber balloon across one end of the can and fasten it with a rubber band. Put four or five grains of dry cereal on the stretched rubber. Now ask your friend to speak ”Hurrey, Hurrey” from the open end (Fig.). Observe what happens to the grain. Why do the grain jump up and down?
1 Answer
1
10/05/2021 2:11 pm
The grain jump up and down because of the vibration caused underneath the stretched rubber. Thus when sound waves fall on the eardrum, it starts vibrating back and forth rapidly.