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MEASUREMENT IN SCIENCE AND TECHNOLOGY
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Measurement in science and technology:- Historical development ( in brief), International system of units, Maintenance of standards. Motion:- Motion in Living and non-living. Uniform and non-uniform motion (one direction)-Distance and displacement, velocity and acceleration: distance-time and velocity-time graphs for uniform and uniformly accelerated motion, derivation of equation of motion by graphical method, uniform circular motion (qualitative idea only). Force:- Force and motion: Newton's laws of motion-inertia of a body, inertia and mass, momentum, force and acceleration, conservation of momentum, action and reaction forces. Friction -factors affecting friction, sliding and rolling friction, examples and disadvantages of friction, control of friction (qualitative idea only) Thrust and pressure-Archimedes principle and its applications, relative density. Gravitation:- Universal law of gravitation-force of gravitation of the earth (gravity). Effect of gravity on plants (in brief), acceleration due to gravity, mass and weight, free fall, motion of a projectile with initial horizontal velocity (qualitative idea only). Work and Energy:- work done by a force-power and Energy, Kinetic and potential energy, transformation of energy into other forms, law of conservation of energy, (free fall as an example). Heat:- Heat and temperature-measurement of temperature, temperature scale (Celsius, Kelvin), thermometers-laboratory and clinical, specific heat capacity- computation of heat lost or gained by the method of mixtures. Thermal expansion expansion-coefficient of linear and volume expansion; change of state; latent heat; cooling due to evaporation; humidity and relative humidity. Wave, Motion and Sound:- Motion of a simple pendulum, oscillations and waves. Types of waves -longitudinal and transverse, graphical representation of simple harmonic waves, amplitude, frequency and velocity of a wave. Nature of sound and its propagation range of hearing in humans, Ultrasound its applications: reflection of sound, echo, SONAR. |
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