Skip to main content

Scalar and vector quantities

Scalar quantities: are those physical quantities  which can be described completely by magnitude only e.g.,Area,volume,mass,speed,density,distance,charge,energy,temperature,length,time,etc.

Scalar quantities have magnitude but no direction,they can be added,subtracted or multiplied by using simple rules of algebra.

Vector quantities are those physical quantities which possesses magnitude as well as direction ,e.g. Displacement,velocity,acceleration,momentum,force,impulse,electric field,gravitational field etc.

Vector quantities have magnitude as well as direction.e.g., to describe the motion of an object completely,we must specify both how fast it is moving and into which direction it is moving.

Vectors do not follow the laws of algebra,i.e.,vectors can not be added,subtracted or multiplied by the way of scalars,because in addition to magnitude vectors have direction also,so vectors can be added, subtracted or multiplied by using rules of vector algebra.The division of a vector by another vector is not a valid operation in vector algebra.
Labels:

Popular posts from this blog

Division of elements of four blocks(s,p,d and f blocks)

The elements in the long from of the periodic table can be divided into four main blocks i.e., s,p,d and f blocks respectively. 1). s-block elements :  The elements in which the last electron enters the s-orbital of their outermost energy level are called s-block elements. This block constitute elements of groups 1 and 2 having the general outer shell electronic configuration as ns1 and ns2 respectively. The elements corresponding to ns1 configurations are called alkali metals while those corresponding to ns2 configurations are called alkaline metals.Thus, the general electronic configuration of s-block elements may be expressed as ns1or2. General characteristics of s-block elements: With the exception of hydrogen,the general characteristics of s-block elements are: (1) They are soft metals having low melting and boiling points. (2) They are highly reactive and reactive and readily from univalent or bivalent positive ions by losing the valence electron. (3) They have low...
Read more