Donate HereLinear momentum
Linear momentum Linear momentum is a product of the body’s mass and its velocity. The S1 unit of momentum is kgms-1 When a force F ... Read More
Newton’s laws of motion
Newton’s laws of motion First Newton’s law of motion. A body remains in its state of rest or uniform motion in straight line unless an ... Read More
Scalar and vector quantities and resolving of forces
Scalar and vector quantities Scalar quantities are physical quantities which have only magnitude; for, example speed, mass, volume, energy, time and temperature. Vector quantities are ... Read More
Motion under gravity and projectiles
Motion under gravity In absence of any resistance, all bodies regardless of their mass fall with same acceleration near the earth’s surface. Acceleration due to ... Read More
Linear motion, equations of motion
Linear motion Terms used Displacement is the distance moved by a body in a specific direction Velocity is the rate of change of displacement Uniform ... Read More
Physical quantities, units, and dimensions
Physical quantities Physical quantities are divided into two groups (a) Fundamental quantities These are physical quantities that cannot be expressed in the form of other ... Read More
Optical instruments (A-level)
Optical instruments An optical instrument is a device that aids vision working on the principles of reflection and refraction of light. Examples are the human ... Read More
Refraction through the lenses (A-level)
Refraction through lenses A lens is a piece of glass bounced by one or two spherical surfaces. Lenses are of two types namely; (i) ... Read More
Geometrical optic, prisms (A-level)
Deviation of light through a prism The angle of deviation caused by the prism is the angle between the incident ray and the emergent ray. ... Read More
Principles of refraction , refraction through a glass block and liquids
Refraction at plane surfaces Refraction is the bending of light at an interface between two media of different optical densities or it is the change ... Read More
Convex and concave mirrors (A-level)
Reflection at curved mirrors Curved mirrors are of two types namely; (i) Concave (Converging) mirror: it is part of the sphere whose center C is ... Read More
Plane mirrors (A-level)
Geometrical optics Optics is the study of light energy and its properties Evidences that light is a form of energy When light enters our eyes, ... Read More
Simple machines (O-level physics)
Machines A machine is a device that makes work easier. In machines, an effort (force in Newtons) is applied to move the load. The ... Read More
Functional derivatives of carboxylic acids
Functional derivatives of carboxylic acids Closely related to carboxylic acids and to each other are a number of chemical families known as functional derivatives of ... Read More
Benzene and its compounds
Aromatic compounds These include benzene and compounds that resemble benzene in chemical behavior. Benzene Chemical formula: C6H6. Structure Benzene is a cyclic compound with delocalized ... Read More
Polymerization
Polymerization A polymer is a high molecular mass species consisting of regularly repeating units or chemically similar units, linked by primary covalent bonds. Polymerization is ... Read More
Carboxylic acid or alkanoic acids
Carboxylic Acids The carboxylic group is a combination of a carbonyl group and a hydroxyl group(OH): the name carboxylic group. Nomenclature Their names end ... Read More