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Find the frequencies of the first three harmonic of a piano string of length 1.5m, if the velocity of the waves on the string is 120ms-1
The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for
A plane sound wave of frequency 85.5 Hz and velocity 342 ms-1 is reflected from a vertical wall. At what distance from the wall does the wave have an antinode?
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