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okay so it works when plugged in and when my i touch is in it, but i cant get it to work with batteries. they are brand new and i want to listen to it from my itunes on my computer and it wont work. help please thanks!!

a displacement diagram of a standing wave in an organ pipe that is 2.10m long, open at one end but closed at the other. Note the waveform is NOT the waveform for the fundamental. 1. Find the wavelength of the fundamental mode of vibration for this pipe. 2. What is the frequency of the...