question_answer 41)

  A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case (a) sound will be louder but pitch will not be different (b) sound will be louder and pitch will also be higher (c) sound will be louder but pitch will be lower (d) both loudness and pitch will remain unaffected

Answer:

  (c) In the second case, sound will be louder but pitch will be lower, because pitch of sound directly depends on frequency.