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Standing waves in pipes: a) The closed end of a pipe MUST be a node, and an open end MUST be an antinode, Sketch the fundamental for these 1.0 m-long pipes, and record the wavelength. Assuming the speed of sound in air is 343 m/ s, determine the frequency. Pipe closed at one end: Pipe open at both ends: fundamental: 1 = f = fundamental: 1 = f = b) The closed end of a pipe MUST be a node, and an open end MUST be an antino Sketch the fundamental for these 0.60 m-long pipes, and record the wavelength Assuming the speed of sound in air is 343 m/ s, determine the frequency. Pipe closed at one end: Pipe open at both ends: fundamental: 1= f = fundamental: 1 = f =