sound has energy- 8th class english medium

This is a video lesson made on 8th class Telugu medium physical science text book of Andhra pradesh and Telangana states. chapter 5: sound Topic name: sound has energy i am a physical science teacher, from z.p.p high school Tatiparthi, East Godavari district , A.P i hope it is very useful for rural students. i am very thankful to you, if you give good suggestions.