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A compound wire is attached to a wall and hanging over a pulley with a mass...

A compound wire is attached to a wall and hanging over a pulley with a mass attached to the end and hanging down off of a table. The compound wire is made up of two different wires. The part attached to the wall is made of aluminum and has a length of 60 cm, a cross-sectional area of 1 × 10^-2 cm^2, and a density of 2.6 g/cm^3. The second part, which is a steel wire that has a density of 7.8 g/cm^3 and the same cross-sectional area as the aluminum wire, is hanging over the pulley with a mass of 10 kg attached to the end. The distance from the pulley to the wall is 146.6 cm. What is the lowest possible frequency for a wave in this compound wire that would generate a node at the point that the two wires combine and how many nodes are observed at this frequency?

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