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HI GUYS ... CAN SOMEBODY PLEASE GIVE ME ALL FORMULAS FOR SOUND ..(ONLY RELEVANT TO CLASS 8) 40 POINTS FOR GRAB. #NOSPAM

Answer»

s of sound :(i) Echo Speed of echo = ( 2 × distance between surface and source ) / time(ii) V = f λwhere V = VELOCITY of WAVE ,f = frequency of sound wave ,λ = wavelength .(iii) f = 1 / twhere f = frequency of wave ,t = time PERIOD .(iv) E = h nuwhere h = Plank's constantE = ENERGY of wave .(v) f = √T/ 2 l ( π r² d )f = frequency of STRETCHED stringl = lengthd = densityr = radiusT= time period .Note that this formula is for stretched string only.Hope it helps !



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