Homework Answers
a) λ = v/f = 329/(0.75*103 ) = 0.438666667 m
λ = 0.438666667 m
B) for echo wave travel back so total distance =2d
v = 2d/t
d = vt /2
C)
d = vt /2 = 329*4.6 /2 = 756.7 m
number of wavelength = d/λ = 756.7/0.438666667 = 1725
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