ten percent law

According to this, the wavelength ( l m ) of maximum intensity of emission of black body radiation is inversely proportional to the absolute temperature (T) of the black body i.e., where b is Wien's constant and is 2.898 x 10 - 3 mK Lummer and Pringsheim confirmed through experimen..

. Second law of thermodynamics states that processes of energy transformation will not occur spontaneously unless there is degradation of energy from a non - random to a random form. Energy transformations, which occur within the ecosystem are considered in ecological energetics. The quan..

Newton's Second Law of Motion - Earlier we have mentioned that application of force can change the velocity of the moving object. Let us suppose that a body of mass 'm' is moving with a velocity 'u'. When a force F is applied on the body for 't' seconds, the velocity changes from the init..

The Universal Law of Gravitation or Newton's Law of Gravitation - Sir Issac Newton gave a mathematical relation to calculate the force of gravitation and this relation is known as the universal law of gravitation. According to this law “Every particle i..

The rate of change of momentum of a body is proportional to the applied force and takes place in the direction in which the force is applied. For a constant mass system We have already learnt that the rate of change of velocity is called acceleration where k is the constant of proportionality and t..

Combining we get, and is called permeability of free space. In the vector form, S.I. unit is 1 tesla or 1..

Problems Based on Boyle's Law - Example 1: A given mass of a gas occupies 240 ml at 800 mm of Hg. What volume will the gas occupy if the pressure is increased to 1200 mm of Hg, temperature remaining constant? Solution:- P 1 = 800 mm P 2 =1200 mm V 1 =240 ml V 2 =? Applying Boyle's La..

>Remove the pins and draw a line OR passing through P' and Q' to represent the reflected ray. Measure the angle of incidence ION and the angle of reflection NOR. i = r and P, Q, P', Q', N and O lie in the same plane, thus verifying the laws of reflection. Repeat the experiment for differe..

Stefan-Boltzmann Law - 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 ..

A sales person bought 10 shirts for $25. He sells it at a cost of $3 each. What is the percent of increase in the price of the shirts? => 15% or 21% or 25% or 20%..