59. The wave function of the string wave is given by
, where h denotes a general function. The speed of a wave is____________ .
(A) 2 m/s
(B) 1.5 m/s
(C) 1 m/s
(D) 0.5 m/s
(E) 0.25 m/s
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統計: A(6), B(0), C(1), D(46), E(0) #2356620
統計: A(6), B(0), C(1), D(46), E(0) #2356620