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# Physics 9th Notes

## Chapter 9 Transfer of Heat 9th Class Physics Notes

Chapter 9 Transfer of Heat 9th Class Physics Notes Chapter 9 Transfer of Heat 9th Class Physics Notes Q.1 Define conduction of heat and explain mechanism of heat? Also give a few practical example? Conduction of heat:-the process by which heat energy is transferred from particle to particle by collision is called conduction of heat. …

## CHAPTER 8 THERMAL PROPERTIES OF MATTER Physics 9th Notes CHAPTER 8 THERMAL PROPERTIES OF MATTER Physics 9th Notes CHAPTER 8 THERMAL PROPERTIES OF MATTER S.NO Heat S.NO Temperature. 1 it is the total K.E of molecules of a body. 1 It is the average K.E of molecules of a body. 2 It gives the sensation of warmth 2 It is the degree of coldness …

## Chapter 7 Properties of Matter Physics Class 9th Notes

Chapter 7 Properties of Matter Physics Class 9th Notes Chapter 7 Properties of Matter Physics Class 9th Notes Q.1 explains the kinetic molecular model of matter? Ans. kinetic molecules model of matter:- according to this theory matter consists of small particle called modules. Modules are its made of small particle called atoms. These molecules are …

## Work Power and Energy Class 9 Notes Physics

Work Power and Energy Class 9 Notes Physics Work Power and Energy Class 9 Notes Physics Q.2 Define energy? Also give its different types?             Ans. energy:- The ability of a body to do work is known as energy it’s unit same as work that is joul.             forms of energy:- different types of energy …

## Gravitation Class 9th Physics Notes

Gravitation Class 9th Physics Notes Gravitation Class 9th Physics Notes Gravitation Class 9th Physics Notes Q.3 Explain variation of “g” with altitude? Ans. considers an object laying on the surface of earth as shown in figure. Where me is mass of earth Re is radius of earth and “h” is the height of object from …

## Class 9th Physics Notes Chapter 4 TURNING EFFECT OF FORCES

Class 9th Physics Notes Chapter 4 TURNING EFFECT OF FORCES 9th class notes for 9th class Physics Class 9th Physics Notes Q.6 Define and explain center of gravity and center of mass? Ans.(1) Center of gravity:- the point where whole weight of the body appears to act is known as center of gravity. Explanation:- we …

## Physics Notes class 9th

Physics Notes class 9th Physics Notes class 9th Physics Notes class 9th Chapter 1 PHYSICAL QUANTITIES AND MEASUREMENT Q.1      what is physics? Also describe its important branches? PHYSICS :> The branch of science which deals with the study of properties, energy and their mutual relationship is called physics” Some important branches of physics are given …