 # Collisions

An instance of one moving object or person striking violently against another.Elastic collision: An elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies after the encounter is equal to their total kinetic energy before the encounter. Elastic collisions occur only if there is no net conversion of kinetic energy into Read more about Collisions[…] # Graphs of simple functions

CONSTANT FUNCTION: Let k be a fixed real number. Then a function f (x) given by f (x) = k for all x ϵ R is called a constant function. Sometimes we also call it the constant function k.IDENTITY FUNCTION: The function defined by I (x) = x for all x ϵ R is called the identity function on R.RECIPROCAL FUNCTION: The function that associates each non-zero real number x to its reciprocal 1/x Read more about Graphs of simple functions[…] # Quantum Mechanical Model

The wave mechanical model of atom comes from wave equation. The wave equation describes the electron in motion as a three dimensional wave. This was given by Schrodinger x, y, z are Cartesian coordinates m is mass of electron. V is potential energy of electron E is total energy of electron h is Planck’s constant. Read more about Quantum Mechanical Model[…] # Algebra of Matrices of Order 2 and 3

EQUALITY OF MATRICES DEFINITION: Two matrices A = [aij] mxn And B = [bij] mxn are said to be equal if 1. m = r, i.e., the number of rows in A equals the number of rows in B 2. n = s, i.e., the number of columns in A equals the number of columns in B 3. aI Read more about Algebra of Matrices of Order 2 and 3[…] # Archimedes’ Principle

The principle states that “when a body is partially or completely immersed in a fluid, it experiences a buyont force (upthrust) due to which it appears lighter, the apparent loss in the weight of body is equal to the weight of the liquid displaced”. Proof of Archimedes’ Principle: Consider a cubical block ABCDEFGH of face Read more about Archimedes’ Principle[…] # Types of matrices

Definition: A set of mn numbers (real or imaginary) arranged in the form of a rectangular array of m rows and n columns is called an m x n matrix (to be read as ‘m’ by ‘n’ matrix). An m x n matrix is usually written as . In compact form the above matrix is Read more about Types of matrices[…] # Bohr’s Atomic Theory

Bohr’s atomic Theory It is based on the application of quantum theory of radiation. Postulates:- 1. The electrons revolve around the nucleus with definite velocity in certain fixed closed paths called orbits. There are numbered as 1, 2, 3, 4…… (Or) K, L, M, N from the Nucleus. 2. The angular momentum of electron is an Read more about Bohr’s Atomic Theory[…] # FUNCTIONS

Let A and B be two non-empty sets. Then a function ‘f’ from set A to set B is a rule or method or correspondence which associates elements of set A to elements of set B such that i) All elements of set A are associated to elements in set B. ii) An element of Read more about FUNCTIONS[…] # Angular Velocity and its relation with linear velocity

Typical particle (at a point P) of the rigid body rotating about a fixed axis (taken as the z – axis). The particle describes a circle with a centre C on the axis. The radius of the circle is r, the perpendicular distance of the point P from the axis. We also show the linear Read more about Angular Velocity and its relation with linear velocity[…]