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)