Sound and waves

A tuning fork of frequency 340 Hz 340 \text{ Hz} is sounded above an organ pipe of length 120 cm 120\text{ cm} . Water is now slowly poured in it.

What is the minimum height of water column required for resonance?

Take the speed of sound in air as 340 m/s 340 \text{ m/s} .

25 cm 25\text{ cm} 75 cm 75\text{ cm} 95 cm 95\text{ cm} 45 cm 45\text{ cm}

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