In our daily life we come across various kinds of motions. You have already learnt about some of the e.g. rectilinear motion and motion of a projectile. Both these motions are non- repetitive. We have also about unform circular motion and orbital motion of planets in the solar system. I…

Convection is a mode of heat transfer by actual motion of a matter. It is possible only in fluids. Convection can be natural or forced. In natural convection, gravity plays an important part. When a fuild is heated from below, the hot part expands and, therefore, becames less dense. Bec…

In this article we shall study laws that govern thermal energy. We shall study the processes where work is converted into heat and vice versa. In winter, when we rub our palms together, we feel warmer; here work done in rubbing our palms together, we feel warmer; here work done in rubbing…

Introduction We all have common- sense notions of heat and temperature. Temperature is a measure of 'hotness' of a body. A kettle with boiling water is hotter than a box containing ice. In physics, we need to define the notion of heat, temperature etc., more carefully. In this art…

In the article, we studies the motion of objects oscillating in isolation. What happens in a system, which is a collection of such objects?        A meterial medium provides such as example. Here, elastic forces bind the consituents to each other and, therefore, the motion of one affects …