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d) An open-ended pipe contains a plunger so that the length of the closed-open pipe can...

d) An open-ended pipe contains a plunger so that the length of the closed-open pipe can be varied. The sound wave has frequency 2.1 kHz. (i) As the pipe length is increased from zero, what are the first 3 lengths that produce a standing wave? (ii) Draw the standing wave patterns in each case. (iii) The speed of sound varies increases with √? where T is the temperature of the air in Kelvin. Consider two identical pipes resonating at their 4th harmonic frequency at 300 K. By how many degrees would you need to increase the temperature of one pipe to produce a beat frequency of 8.0 Hz?

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