Physics
Difference between scalar and vector quantities
Difference between scalar and vector quantities
SCALAR QUANTITIES  VECTOR QUANTITIES 
Definition 

The physical quantities. which are completely specified by their
magnitude only, are called scalar quantities. 
The physical quantities, which are completely specified by their magnitude direction both are
called vector quantities 
Characteristics 

Scalar can be added, subtracted and Multiplied by a simple arithmetic method.  They are added, subtracted and multiplied by the geometric or trigonometric methods.

Representation 

Scalar can be represented by a number i.e.
50 seconds. 
A vector can be represented graphically by a directional line segment with an arrow. 
Examples 

Mass, volume, time, distance, speed, density, work, energy, temperature, etc.  Area, displacement, velocity, acceleration
force, momentum, torque, etc. 