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NCERT Class 9 Science Chapter 14 NATURAL RESOURCES Notes Earth's Life-Supporting Systems Introdu…

NCERT Class 9 Science Chapter 13 WHY DO WE FALL ILL? Notes 13.1 Health and its Failure: 13.1.1 The S…

NCERT Class 9 Sciences Chapter 12 SOUND Notes Introduction to Waves: Wave: disturbance in a medium ca…

NCERT Class 9 Chapter 11 WORK AND ENERGY Notes Introduction to Work and Energy The concepts of effor…

NCERT Class 9 Chapter 10 GRAVITATION Notes Introduction to Gravitation This chapter discusses gravita…

NCERT Class 9 Science Chapter FORCE AND LAWS OF MOTION Notes Introduction to Force A force is an effo…