relationships between physical quantities

At last in 1789 a system of measurement was invented based upon the powers of ten. Each unit quantity was divided into ten parts and each of these parts into further ten and so on. Multiples of the unit are ten, one hundred, one thousand etc. This was very logical. Once the size of the u..

Advantages of Dimensional Analysis - Dimensional equations are used to validate the correctness of a physical equation. Dimensional equations are used to derive correct relationship between different physical quantities. Dimensional equations are used to conv..

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 t..

Phasors are vectors, which rotate around an origin with a angular speed They have the following properties. (i) Phasors rotate clockwise about the origin with angular speed equal to the angular frequency of current and voltage. (ii) The length of the phasors represent the amplitude of the alternati..

The condition in which a particular material exists is described by physical quantities such as pressure, volume, temperature and amount of substance. For example, a tank of oxygen in a welding outfit has a pressure gauge and a label stating its volume. We could add a thermomete..

The Ideal Gas Equation - Another simple equation of state is the one for an ideal gas. The figure below shows an experimental setup to study the behavior of a gas. The cylinder has a movable piston to vary the volume, heating can vary the temperature, and we can pump the desired amount of any gas i..

Four Categories of Physical Quantities - Based on dimensions, physical quantity can be classified under four categori..

Based on dimensions, physical quantity can be classified under four categorie..

The principle of homogeneity of dimensional equation is used to derive a relation between various physical quantities. To derive a physical relation, the dependent factors of a given physical quantity is found. Assuming its dimensions in terms of th..

De-Broglie Relationship - De-Broglie noted that according to the theory of relativity, the role played by momentum 'P' and the energy 'E' of the particle is done by angular frequency ' w ' and the propagation vector 'k' of a wave. According to Einstein relation E = mc 2 Where 'm' is the m..