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**1. A periodic longitudinal wave that has a frequency of 20.0 Hz travels along a coil spring. if the distance between successive compressions is 0.4m, what is the speed of the wave?**

**2. v= wavelength times frequency**

**3. v= wavelength times frequency**

= 0.4 * (20)

= 8 m/s ------ I'm not sure if this is right.

= 0.4 * (20)

= 8 m/s ------ I'm not sure if this is right.