A wave on a string is described by dxt32cm

A wave on a string is described by D(x,t)=(3.2cm) *sin[2pi(x/7.2cm)+t/(0.14s)+1)], where x is in m and t is in s .

A) What is the wave speed? Express your answer using two significant figures. (in m/s)

B) What is the frequency? Express your answer using two significant figures. (in HZ)

C) What is the wave number? Express your answer using two significant figures.(in rad/m)

D) At , what is the displacement of the string at ? Express your answer using two significant figures. (in cm)

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