Physics

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Those physical quantities which have only magnitude but no direction are called scalars. For eg. Mass, Speed, Distance, Work, Energy, Charge, Current etc.   Those physical quantities which have both magnitude and direction are called vectors. For eg. Displacement, Force, Velocity, Acceleration, Linear Momentum etc.   Vectors are generally represented by a letter with arrow head.       Types of Vectors: i]   Unit Vector      A vector is said to be a unit vector if its magnitude is one.         ii]  Null Vector      If the magnitude of a vector is zero, the…

Dimension: When a quantity is expressed in terms of the basic quantities, it is written as a product of different powers of the basic quantities. The exponent of a basic quantity that enters into the expression is called the Dimension of the quantity in that base, For Example; Thus, the dimensions of force are 1 in mass, 1 in length and -2 in times. In this type of calculation the magnitudes are not considered. The dimensions of a physical quantity are the powers to which the fundamental units of mass, length and time have to be raised to obtain its unit.…

Introduction: The nature around us is colorful and diverse. It contains phenomena of large varieties as the wind, the sand, the water, the planets, the rainbow, the function of human body, the energy coming from the Sun and the nucleus. Physics is the study of nature and its laws. It is an experimental science. We expect that all these different events in nature take place according to some basic laws. Physics is concerned with the basic rules which are applicable to all domains of life. The nature around us is like a big chess game played by nature. The events…