Two strings are made of the same material and have equal tensions. String 1 is thick; string 2 is thin.

(a) Is the speed of waves on string 1 greater than, less than, or equal to the speed of waves on string 2?

(b) Choose the best explanation from among the following:

I. Since the strings are made of the same material, the wave speeds will also be the same.

II. A thick string implies a large mass per length and a slow wave speed.

III. A thick string has a greater force constant, and therefore a greater wave speed.