An open pipe that is 0.50 m long is sounded at its fundamental frequency

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

An open pipe that is 0.50 m long is sounded at its fundamental frequency. What length must a pipe closed at one end have so that its third harmonic has the same frequency? (Take the speed of sound in air to be 340 m s⁻¹.) (a) 0.50 m0.50\,\text{m} (b) 0.75 m0.75\,\text{m} (c) 0.25 m0.25\,\text{m} (d) 1.00 m1.00\,\text{m}

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