Vocabulary Daily 1

1. Prerogative: exclusive right, privilege and prerequisite. 2. Pronounced: easily noticeable. 3. Contemplation: a long and thoughtful observation. 4. Tenacious: aware, mindful 4. Panoramic: as from an altitude or distance. 5. Fissure: a long narrow depression in a surface. 6. Indescribable: defying expression 7. Ecstatic: a state of elavated bliss. 8. Drenched: abundantly covered. 9.

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Optics

A ray o light s the straight line path followed by light in going from one point to another. Ray optics is also called Geometrical Optics. Any body at a temperature above 0 K emits electromagnetic radiation. For the same power per unit area, yellow light produces the strongest sensation of sight. Photometry is a

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Mechanics of solids and fluids

Inter-atomic forces: the forces acting between the atoms due to electrostatic interaction between the charges of the atoms are called intern-atomic forces. Thus inter-atomic forces are electrical in nature. In case of non-uniform charge distribution, the center of mass of positive charge may not coincide with the center of mass of negative charge. Such a

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Dimensional formula and SI Units

Specific gravity have no units and no dimension. Force= Mass* acceleration = mass* Velocity/time= M (1), L(1), T (-2); SI unit, Newton Universal Constant of gravitation (G)= M (-1), L (3), T(-2); N*m^2/kg^2 Work dimension = Energy = M(1), L(2)T (-2);  Joule Moment of force dimension same as of Work but SI unit is N-m.

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Laws of Motion

Linear momentum of the body is the quantity of motion contained in the body. Newton’s third law of motion signifies that forces in nature always occur in pairs. A single isolated force is not possible. Force of action and reaction act always on different bodies. Hence, they never cancel each other. Each force produce its

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Kinematics

Kinematics is that branch of mechanics which deals with the study of motion of objects without taking into account the factors (i.e. nature of forces, nature of bodies etc.) which cause motion. Rectilinear motion is that motion in which a particle or point mass body is moving along a straight line. Translatory motion is that

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Electrical devices

Electrical devices Fermi energy is the maximum possible energy possessed by free electrons of a material at absolute zero temperature. The value of Fermi energy for different materials is different. Fermi level in semiconductor. It is that energy level in energy band diagram of semiconductor for which the probability of occupancy becomes half. The electric

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Gravitation

Gravitation is the name given to the force of attraction between any two bodies of the universe. It was discovered by the Newton in the year 1665. F= Gm1m2/r^2 Evidence in support of Newton’s law of Gravitation The rotation of earth around the sun or moon around the earth is explained on the basis of

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Work-Energy-Power

Work, Energy and Power Work is said to be done by a force action on a body, provided the body is displaced actually in any direction except in a direction perpendicular to the direction of the force.  absolute unit of work is Joule and ergs. 1 joule = 10^7 ergs. Gravitational unit of  work is

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