elementary school

. Don't substitute running, listening and reading with playing with the computer. Depending on the child's age, between 15 to 45 minutes a week, is all preschoolers need. The computer makes your child competent, but you still have to teach him to be human." Dr. Murthy emphasizes that to incorporate..

Robert Boyle prepared hydrogen in 1672, by treating iron with sulphuric acid, but he could not decipher its basic nature. The credit of the discovery of hydrogen goes to the British chemist Henry Cavendish. He prepared the gas by the action of dil HCl with zinc in 1766. He established its ..

. Transition State explains the rate of reaction in term of formation of a transition state of reacting molecules. The formation of transition state requires energy of activation. Transition state theory connects kinetic rates with thermodynamic properties of reactants and the transition state. The..

Let us consider a body of mass 'm' being raised vertically to a height 'h' as in the figure (1). The work done is mgh. Suppose we take the body along the path as in figure (3). The work done during the horizontal motion is zero. Adding up the work done in the two vertical parts of the paths, we get..

Introduction - We observe various chemical processes in our daily life. It is a common observation that the rates of these chemical reactions vary and depend on certain factors. The knowledge of the rate of a reaction is of importance in industries to ensure optimum productivity. An industrial proc..

Mechanism of Reaction - A balanced chemical equation represents the overall result of a chemical reaction. However, at the molecular level, more than one reaction step might be involved. Most reactions can be broken down into a sequence of elementary reactions. This breaking down of a rea..

. Elements with similar properties occupy similar positions when their properties are plotted as a function of their atomic weights was Lother Meyer's arrangement. All the above attempts were very elementary and could not be successfully applied to all the elements, which at present are a..

Let R i denotes the i t h row of the matrix A = [a i j ] then the elementary row operations on the matrix A are defined as: 3. R i g R i + kR j means multiply each element of j t h row by k and add it to the corresponding elements of i t h row. The corresponding column tra..

Everything that we use in our daily life is ultimately governed by principles of physics. All gadgets we use everyday at home, bicycles and cars, all different types of machinery and instruments, work on principles of physics. Hence to understand even the elementary working of these thing..