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Origin of Resistivity - In electrostatic situations, the electric field is zero everywhere within the conductor, and there is no current. This does not mean that all charges within the conductor are at rest. In metals such as copper or aluminium, some of the electrons are free t..

In electrostatic situations, the electric field is zero everywhere within the conductor, and there is no current. This does not mean that all charges within the conductor are at res..

Origin of Life..

Origin of Life..

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We know that in chemical reactions, energy is required to break old bonds of the reactants. Energy is also released to form new bonds, which give the end products. The net energy change (released or absorbed) in a reaction will be equal to energy required to break all the bonds in reactants minus ..

Let P(x,y) and Q(x + D x,y + D y) be two neighbouring points on the curve y = f (x). Let TPT' be the tangent at P, PQ is called the secant of the curve and the slope of secant..

Arithmetic Mean (A.M.) - 1. If a, x, b are in A.P, then x is called the arithmetic mean (A.M.) between the extremes a and b. 2. a. To insert n arithmetic means between two given quantities. Let a and b be any two given quantities, and let A 1 ,A 2 ,..

Dyes - Meaning and Characteristics - Colored substances used for dyeing fabrics are called dyes. A true dye must: Have a suitable color Be able to attach itself to the material from solution or be capable of being fixed on it Be fast to light and washing when fixed. For this it must be re..