electromagnetic waves has velocity of 3*10^8and wavelenght of 5000m what is the frequency, 768, 6000, 1. 5x10^12, property of electromagnetic wave is, doesnt need medium to propagate, longitudinal, transverse, both a & c, femal has lower frequency sound wave than men so her voice velocity is, her velocity is slower than men, faster than men, equal to men, what is the number of waves from 7th trough to to 10th crest, 2. 5, 3, 17

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