Rectilinear Motion: Definition, Types, Equations of Motion and Solved Examples
Rectilinear motion is the motion of a body along a straight line, so its position needs only one coordinate and one axis to describe…Read More →
Science & Maths
Physics, chemistry and mathematics for engineering students: definitions, formulas, derivations and solved examples.
VSEPR Theory: Postulates, AXE Notation, Shapes and Bond Angles
VSEPR theory (Valence Shell Electron Pair Repulsion) predicts the shape of a molecule by placing the electron pairs around the central atom as far…Read More →
Valency of Chlorine: Why It Is 1, Plus Variable Valency
The valency of chlorine is 1. A chlorine atom (atomic number 17, electron configuration 2, 8, 7) has seven electrons in its outer shell,…Read More →
Composite Numbers: Meaning, List from 1 to 100, Test and Examples
A composite number is a natural number greater than 1 that has at least one divisor other than 1 and itself, so it has…Read More →
Pythagorean Theorem: Formula, Proof, Examples and Uses
The Pythagorean theorem says that in a right-angled triangle, the square of the hypotenuse equals the sum of the squares of the other two…Read More →
Thales Theorem: Statement, Proof, Converse and Examples
Thales’ theorem states that an angle inscribed in a semicircle is a right angle: if BC is a diameter of a circle and A…Read More →
Linear Programming Problems (LPP): Formulation, Graphical and Simplex Methods
A linear programming problem (LPP) is an optimisation problem in which a linear objective function is maximised or minimised subject to a set of…Read More →
Plaster of Paris Formula: CaSO4·½H2O (Preparation, Setting and Uses)
The chemical formula of plaster of Paris is CaSO4·½H2O, and its chemical name is calcium sulphate hemihydrate. It is made by heating gypsum (CaSO4·2H2O)…Read More →
Kohlrausch Law: Definition, Formula, Applications and Solved Examples
Kohlrausch law (the law of independent migration of ions) states that the limiting molar conductivity of an electrolyte is the sum of the limiting…Read More →
Schottky Defect: Definition, Conditions, Examples and Effects on Properties
A Schottky defect is a point defect in an ionic crystal in which an equal number of cations and anions are missing from their…Read More →
Tetravalency of Carbon: Reason, Hybridisation, Catenation and Isomerism
Carbon is tetravalent because it has four electrons in its outermost shell and completes its octet by sharing all four of them, forming four…Read More →
SI Unit of Conductivity and Conductance Explained
The SI unit of electrical conductivity is the siemens per metre (S/m). The SI unit of electrical conductance is the siemens (S). The two…Read More →