Physics 9th

Physics IX Notes Chapter 9 Transfer of Heat Q.1 Define conduction of heat and explain the mechanism of heat? Also, give a few practical examples? Conduction of heat:-the process by which heat energy is transferred from particle to particle by collision is called conduction of heat. ð  Mechanism of heat conduction:- there are two ways …

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Physics IX Notes Chapter 8 Thermal Properties of Matter Q.1 Define heat and temperature? Also, show deference b/w them? Ans. Heat:- The form of energy which transfers from one body to another body due to difference of temperature between them is called heat (OR) The total K.E of molecules of a body are called heat. …

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 Physics IX Notes Chapter 7 Properties of Matter Q.1 explains the kinetic molecular model of matter? Ans. kinetic molecules model of matter:- according to this theory matter consists of small particles called modules. Modules are its made of small a particle called atoms. These molecules are always I state of motion. Their the motion may …

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CHAPTER NO 4 TURNING EFFECT OF FORCES Q.1 explains the various forces acting on a body? Ans. (a) in the earth gravitation field, the attracts everything to ward its center the gravitational force acting on each particle of body is parallel as shown in fig (a) (a)    In figure (b) two a block is shown …

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  Gravitation Q.1 state and explain Newton’s law of gravitation? Ans. Newton’s of universal gravitation:-  this law states that in this universe Avery two bodies attract each other with a force which is directly proportional to the product of their masses and inversely proportional  to the square of the distance b/w them. Explanation:- consider two …

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 Physics IX Notes Chapter 6 Work Power and Energy Q.2 Define energy? Also, give its different types?             Ans. energy:- The ability of a body to do work is known as the energy it’s unit the same as work that is jouled.             forms of energy:- different types of energy are given below. (1)    Chemical …

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 Physics IX Notes Chapter 2 KINEMATICS what is kinematics? Also, define rest and motion? Ans.     Kinematics:-the branch of physics which deals with the study of the motion of bodies without reference to force is called kinematics.             Rest:-if a body does not change its position with respect to its surrounding then the body is called …

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