What is a scalar and what is a vector?

Answer 1

Scalar quantities are those which have magnitude but not any specific direction, but vector quantities have both magnitude and direction.

Answer 2

physical quantities having magnitude but not direction are scalars e.g mass, distance,work,energy,temperature area,volume charge etc while those physical which hav direction as well as magnitude are vectors e.gtorque,velocity,displacement,weight,force etc...

Answer 3

A scalar is a quantity that has magnitude only, while a vector is a quantity that has both magnitude and direction. Scalars are represented by single numerical values, while vectors are represented by magnitude and direction arrows. Examples of scalars include temperature and speed, while examples of vectors include velocity and force.

Answer 4

A scalar quantity is one in which a direction is not relevant. If a direction is specified as part of a measurement, then you would be using a vector.