1. Introduction Rational numbers are numbers that can be expressed as the ratio of two integers, where the denominator is not zero. Examples: numbers like 1/2, -3/4, 5, 0. 2. Properties...
Class 8 Science – Friction: Factors, Advantages, and Disadvantages 1. Introduction Friction is the resistance offered by a surface when one object moves over another. It opposes motion...
Question: In a cyclic quadrilateral ABCD, AB = 4, BC= 5, CD = 9 and DA = 5. Find the length of the diagonal AC. (1) 8 (2) 7 (3) 6 (4) √61. Solution: AC*BD = 36+25 = 61 AC/BD = 20+45/...
Class 8 Science – Sound: Production and Propagation 1. Introduction Sound is a form of energy that produces a sensation of hearing. It is produced when an object vibrates and creates...