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Computer Science Class 9 Chapter 3: Digital Systems and Logic Design Notes

This chapter introduces digital systems and the branch of mathematics that underlies them: Boolean algebra. It begins by distinguishing analog …

This chapter teaches the systematic process of troubleshooting — identifying and resolving problems with computers and other equipment. It covers …

This chapter explores software — the collection of programs and instructions that tell a computer what to do — as …

Physics is built on physical quantities that can be measured directly or indirectly using instruments. This chapter introduces the difference …

Mechanics is the branch of physics dealing with motion and the forces that cause it. It is divided into kinematics, …

Kinematics describes motion without considering its cause. Dynamics is concerned with the forces that produce and change the motion of …

A force does not only produce straight-line acceleration; it can also turn a rigid body about a point, as when …

Work is done when a force acting on an object moves it through some distance. Energy is the ability to …

This chapter studies how materials respond to applied forces: how solids deform elastically according to Hooke's law, how density describes …

This chapter explains matter's behaviour using the kinetic molecular theory: how the arrangement and motion of particles differ in solids, …

This chapter studies magnets and magnetism: the properties of magnetic poles, the concept of a magnetic field and its field …

This final chapter steps back from specific physics topics to examine the nature of physics itself: its scope as the …