55. IE •• String A has twice the tension but half the linear mass density of string B, and both have the same length.

(a) The frequency of the first harmonic on string A is (1) four times, (2) twice, (3) half, (4) 1/4 times that of string B. Explain.

(b) If the length of the strings is 2.5 m and the wave speed on A is 500 m/s, what are the frequencies of the first harmonic on both strings?