Relations and Functions Class 11 Notes – Chapter 2 Ordered pairs. Cartesian product of sets. Number of elements in the Cartesian product of two finite sets. Cartesian product of the set of reals with itself (upto R x R x R). Definition of relation, pictorial diagrams, domain, co-domain and range of a relation. Function as …
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Sets Class 11 Notes
Sets Class 11 Notes – Chapter 1 Sets are defined as a well-defined collection of objects. A set without any element is termed as an empty set. A set comprising of definite elements is termed as a finite set whereas if the set has an indefinite number of elements it is termed an infinite set. …
Improvement in Food Resources Class 9 Notes
Improvement In Food Resources Class 9 CBSE Notes – Chapter 15 Improvement in Food Resources Class 9 Notes explains how the technology and practices for growing food have changed over the ages – from primitive tools to state of the art farming equipment and practices which increases yield and quality.
Natural Resources Class 9 Notes
Natural Resources Class 9 CBSE Notes – Chapter 14 Natural Resources Class 9 Notes explain the various resources found on Earth and their implications on life. Some resources are more precious than others, such as gold and diamonds, while others are quite abundant, but still, hold commercial significance, such as iron and nickel. On a larger, …
Why Do we Fall ill Class 9 Notes
Why Do We Fall ill Class 9 CBSE Notes – Chapter 13 Humans have been falling sick since times immemorial. Before science and technology, humans have attributed sickness to the supernatural, for instance, when there was a tuberculosis outbreak during the 19th century, people had associated its symptoms with vampirism. This is due to the …
Sound Class 9 Notes
Sound Class 9 CBSE Notes – Chapter 12 There are various sources of sounds around us – from the birds, the leaves rustling in the wind to the cars and the sounds of our own voice. In science, we define sound as a form of energy that travels in waves. A body produces soundwaves and these vibrations …
Work, Power And Energy Class 9 Notes
Work And Energy Class 9 CBSE Notes – Chapter 11 Work, Power And Energy Class 9 Notes describes the meaning of work and energy, and how they are related to each other. The term work might imply working hard, such as studying for an exam, or a performing a job. However, in science, the term “work” …
Gravitation Class 9 Notes
Gravitation Class 9 CBSE Notes – Chapter 10 Gravitation Class 9 Notes explains how gravity works in intricate detail. We are aware of the fact that the earth has gravity and it keeps every object tethered to the surface. But what exactly is gravity and what are its implications? What is Gravity?Gravity is essentially a force …
Force and Laws of Motion Class 9 Notes
Force And Laws Of Motion Class 9 CBSE Notes – Chapter 9 Force and Laws of Motion Class 9 Notes introduce the laws set down by Isaac Newton and the concept of force. These are essentially the fundamentals of physics and forms the backbone of every physical context known to humans. But how do we define …
Motion Class 9 Notes
Motion Class 9 CBSE Notes – Chapter 8 Describing Motion:If a body is constantly changing its position with respect to time or point of reference, then, that body is said to be in motion. There are various types of motion, namely: Uniform Motion It occurs when equal distances are covered in equal intervals of time by …
CBSE Revision Notes 