Sound | Ch-12 Class 9 Physics Quick Revision Notes
The energy for the ‘life processes’ comes from food. Activities like playing, singing, reading, writing, thinking, jumping, cycling and running requires energy.
Pdf is Loading Please Wait …….
The energy for the ‘life processes’ comes from food. Activities like playing, singing, reading, writing, thinking, jumping, cycling and running requires energy.
Pdf is Loading Please Wait …….