Two waves are traveling simultaneously down a long Slinky. They can be represented by ψ1 (x, t) = 0.0030 sin(6.0x - 300t) and ψ2 (x, t) = 0.0030 sin(7.0x - 250t). Distances are measured in meters and time in seconds. (a) Write the expression for the resulting wave. (b) What are the phase and group velocities? (c) What is Δx between two adjacent zeros of ψ? (d) What is Δk Δx?
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