formulae of physical quantities

The dimensional formula of a physical quantity can be obtained by defining its relation with other physical quantities and then expressing these quantities in terms of mass [M], length [L] and time [..

In general, [X] = [M a L b T c ] RHS represents dimensional formula of physical quantity X, whose dimensions in mass, length and time are a, b and c respective..

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 value of a physical quantity can be obtained in some other system, when its value in one system is given using the method of dimensional analysis. Measure of a physical quantity is given by X = nu, u - size of unit, n - numerical value of physical..

Suppose X = a - b Let D a and D b be absolute errors in measurements of quantities a and b, values of a and b and D X be maximum error in X. Maximum absolute error in X = Maximum absolute error in a + Maximum absolute error in b From equations (1) and (2) it is evident that, when ..

Suppose X = ab Let D a and D b be absolute errors in measurements of quantities a and b, values of a and b and D X be the maximum possible error in X. Dividing both sides by X = ab, we get are relative errors of fractional errors in values of a, b and x. Neglecting as its prod..

Dimensional formula - It is the term which tells about the power with which a fundamental quantity is contained in a physical quantity. E.g., Dimensional formula of velocity is [LT - 1 ], that of density is [ML - ..

One lunar month is the time in which the moon completes one revolution around the earth. Units of all other physical quantities can be derived from the basic units and hence are called "derived units". The following table shows the list of various physical quanti..

Order of magnitude of a quantity is the power of 10 of the number that describes the quantity..