What are scalar and vector?

1.	What are scalar and vector?
Answer» Scalar quantities are those quantities which require only the magnitude for their complete specifications. Physical quantities which can be completely specified by a\xa0number and unit, and therefore have the\xa0magnitude only, are scalars. Some physical quantities which are scalar are mass, length, time, energy, volume, density, temperature, electric charge, electric potential etc.Vector quantities are those quantities which require magnitude as well as direction for their complete specifications. Vectors are physical quantities, which besides\xa0having both magnitude and direction also obey the law of geometrical addition.\xa0(The law of geometrical addition, i.e. the law of triangular addition and law of parallelogram are discussed later in this chapter). Some physical quantities, which are vectors are displacement, velocity, acceleration, force, electric intensity, magnetic intensity, magnetic moment etc. the physical quantity having only magnitude is called scalar quantity .the physical quantity having both magnitude and direction is called vector quantity

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