derivative of a constant

Significance of Photosynthesis - Photosynthesis is the only process which produces enormous quantities of organic matter for sustaining the life on this globe. It is the only known method of manufacture of organic food from inorganic raw materials. Animals including man are directly or indirectly d..

Limitations of Dimensional Analysis - Dimensional analysis has no information on dimensionless constants. If a quantity is dependent on trigonometric or exponential functions, this method cannot be used. In some cases, it is difficult to guess the factors while deriving the rela..

273 + t = T (K) and 273 =T 0 which corresponds to 0 o C on absolute temperature scale The volume of a given mass of a gas is directly proportional to the absolute temperature at constant pressure. If V 1 is the volume of a certain mass of gas at temperature T 1 and V 2 is the volume of th..

From this statement it follows that total energy of the universe, For e.g., system and surroundings taken together as always constant during any physical or chemical process. In order to derive mathematical expression for first law of thermodynamics let us assume that a system ..

When a gas is heated the molecules move faster increasing the pressure. But to maintain the pressure constant, the force of collision is compensated with an increase in volume. So, at constant pressure the volume of the gas increases with temperature. By kinetic gas equation we..

By combining Boyle's and Charles' laws, an equation can be derived that gives the simultaneous effect of the changes of pressure and temperature on the volume of the gas. This is known as combined Ideal Gas Equation. A simple and direct method of deriving this equation is as fol..

The energy of thermal radiation emitted per unit time by a black body of surface A, is given by u = s AT 2 -----(1) where s is a universal constant known as Stefan-Boltzmann constant and T is its temperature on absolute scale. The measured value of s is 5.67 x 10 - 8 W/m 2 - K 4..

Derivation of de-Broglie Relationship - The relationship may be derived by combining the mass-energy relationship proposed by Max Planck and Einstein. According to Planck, photon of light having energy E is associated with a wave of frequency n as: E = h n .....(1) According to ..

> is called the Stefan-Boltzmann constant after Josef Stefan (who discovered equation (ii) experimentally in 1879) and Ludwig Boltzmann (who derived it theoretically, later). The symbol e represents the emissivity of the object's surface, which has a value between 0 and 1, depen..

All gases are made up of large number of minute particles called molecules. Large distances separate the molecules so that the actual volume of the molecules is negligible as compared to the total volume of the gas. The molecules are in a state of constant rapid motion in all dire..