Doppler effect - the change in the apparent (observed ) frequency of a wave as a result of relative motion between the source and the observer, Principle of superposition - whenever two or more waves are travelling in the same region, the resultant displacement at any point is the vector sum of their individual displacement at that point., Sound intensity - the amount of energy that is transferred across a certain area in a specific amount of time, Standing waves - formed when two waves which are travelling in opposite directions, and which have the same speed, frequency and amplitude are superimposed., Sound intensity depends on - amplitude and distance from source of sound, As a person walks towards the speaker, the frequency he or she hears - increase, The Young's Modulus is defined as - Stress/Strain, Elastic deformation - Extension does not exceed the elastic limit of the material, Plastic deformation - Changes the internal structure of a wire., The unit for Compressibility - N-1 M2 , Simple harmonic motion - periodic motion (back and forth motion about equilibrium position) without losing energy., in simple harmonic motion, acceleration directly proportional to - displacement,

SHM, DEFORMATION OF SOLID,WAVE

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