MCQ
A uniform tube of length $60.5\,cm$ is held vertically with its lower end dipped in water. A sound source of frequency $500\,Hz$ sends sound waves into the tube. When the length of tube above water is $16\,cm$ and again when it is $50\,cm,$ the tube resonates with the source of sound. Two lowest frequencies (in $Hz$), to which tube will resonate when it is taken out of water, are (approximately).
  • A
    $281,562$
  • B
    $281,843$
  • C
    $276,552$
  • $272,544$

Answer

Correct option: D.
$272,544$
d
Two lowest frequencies to which tube will resonates are $272\,Hz$ and  $544\,Hz$

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