HEAT      Heat is a form of energy which gives the sensation of warmth. The sum total kinetic energy of all the vibrating molecules of a matter is heat energy. Temperature –The degree of hotne…

Introduction A magnet is a rock or a piece of metal that can pull certain types of metal toward itself. The force of magnets, called magnetism, is a basic force of nature, like electricity a…

Introduction to Light The world as we know is largely known through senses and the sense of sight is one of the most important senses. It is only when the light from an object enters our eye…

Simple machine simple machine , any of several devices with few or no moving parts that are used to modify  motion  and the magnitude of a  force  in order to perform  work . They are the si…