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28. B) I and 2 only A 20 cm long rubber string fixed at both ends obe ) 2 and 3 only D) 3 only ons rubber string fixed at both ends obeys Hook's law. Initially when it is etened to make its total length of 24 cm. the lowest frequency of resonance 18 Vol is further stretched to make its total length of 26 cm. The lowest frequency o resonance will now be: A) the same as vo B) greater than yo. C) lower than yo. D) None of these

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