relations and functions introduction

A cell, a tissue or an organ, which secretes certain useful chemical compounds required for a particular function, is called a Gland. Thus glands, which are seretory in functions, can be of two types, namely (i) Exocrine glands that have ducts or the opening for discharging thei..

The steam engine uses the power generated from steam pressure to move. Coal is used in furnaces to heat water in the boiler to generate steam. Steam pressure makes the wheels of the engine move. As coal is burnt, smoke is emitted and ash is left behind in the furnace. Smoke is let off through the ..

Some Basic Features of Sulphur Dioxide Formula of Sulphur dioxide: SO 2 Vapour Density: 32 Relative Molecular Mass: ..

The word 'Induction' means method of reasoning from individual cases to general ones or from observed instances to unobserved ones. Many important mathematical formulae are such that a result is formed by some means which does not provide for a direct proof. Mathematical Induction is a princ..

When calculating sides or angles of right angled triangles, it is easiest to use the appropriate trigonometric relation. Finding the value of trigonometric ratios from the tables is learnt easily. Nowadays of course calculators are able to give accurate values for any degree o..

The study of world of life is as old as man itself. All living organisms are made up of a few elements which are repeated in each of them. The basic unit of life - cell, is a structural and functional entity of lif..

We have already studied the 'Periodic Classification of Elements' in standard ninth. We know that the periodic table is the arrangement of Elements into periods and groups on the basis of their electronic configuration. The Modern Periodic Table follows the 'Modern Periodic Law' i.e., "The physical..

The derivative, measures the rate at which the dependent variable changes with respect to the independent variable. It is one of the most important ideas in Calculus. The differentiation of functions are widely used in science, economics, medicine and computer scienc..

During the course of study of Mathematics, we must have come across several parts of inverse operations like (addition, subtraction) (multiplication, division) (forming an equation whose roots are given - solving a given equation) and so on. In practical situations, we may be interested to know the..

You have studied in the previous chapter about refraction of light by lenses and also about the nature, position and relative size of images formed by lenses. How can these ideas help us in the study of the human eye? The human eye uses light and enables us to see objects around us. How ..