# Physics

## Punjab Physics Online 9th Class Test Lesson 9 Transfer of Heat

This whole chapter is on the topic of Transfer of Heat, The Flow of Heat Energy from hot body to cold body when both bodies are thermal contact with each other is called Transfer of Heat. There are three ways by which transfer of heat takes place these three ways are Conduction, Convection and Radiations. Transfer of Heat Lesson 9 …

## Punjab Physics Online 9th Class Test Lesson 8 Thermal Properties Of Matter

Heat is the Energy that is transferred from one body to other body in thermal contact with each other as a result of the difference of temperature between them. The Property of a system when all parts of the system have the Same temperature along with its surrounding is called thermal equilibrium. Thermal Properties Of Matter Lesson 8 Physics Online …

## Punjab Physics Online 9th Class Test Lesson 7 Properties of Matter

This chapter is about Properties of Matter. Solids have shape of their own while the Liquids and gasses do not. Liquids on the other hand have definite volume while gasses do not have, Various material differ in their hardness, density, Solubility, Flow, Elasticity, Conductivity and many other Qualities. Properties of Matter Lesson 7 Physics Online Test 9th Below

## Punjab Physics Online 9th Class Test Lesson 6 Work and Energy

This chapter is about the Two topics work and Energy, Work is product of force F and Displacement S in the Direction of Force. The Ability of the Body to do work is called its Energy. When we say that a body has energy we mean that it has the Ability to do work. Thus we need Energy to do …

## Punjab Physics Online 9th Class Test Lesson 5 Gravitation

Everybody in the Universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the Square of the Distance between their Centers. According to the Gravitation Law any object attracts to the others object. It is to be noted that Mass M1 attracts M2towards itself. Gravitation Lesson 5 Physics Online …

## Punjab Physics Online 9th Class Test Lesson 4 Turning Effects of Force

This Chapter is all about Turning Effects of Force, Its Types and details. Splitting up of a force vector into mutually perpendicular Components is called the resolution of that force. The line along which a force acts is called the line of action of the force. When a force moves a body in clockwise direction, the torque or moment of …

## Punjab Physics Online 9th Class Test Lesson 3 Dynamics

In the physics chapter no 3 Dynamics we will discuss about the various topics like Momentum, Force and acceleration, Force and Velocity of a body. A force can a push or pull a body. A force can move or try to move a stationary body, Can stop or trying to stop a moving body and can change the direction of …