Speed of Longitudinal vs Transverse Pulses: Observational Experiment

Aim

Compare the speed of a transverse wave and a longitudinal wave on the slinky.

Prior Knowledge

Motion and speed.

Description of the Experiment

Two pulses are send on a slinky - a transverse and a longitudinal. You need to figure out what their speeds are relative to each other.

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Questions

Are the speeds the same or different? How do you know? Give possible reasons for the difference.