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Problem 15.65 Previous Answers Review 1 Constants A wave is described by the expression y(z, t) (4.0 cm) cos( 1.3 a-55 t), where z is in m and t is in s. Correct Part B What is the speed of the wave? Express your answer using two significant figures 0.43 m/s Submit st Answer incorrect; Try Again; 5 attempts remaining

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y(x,Ð 4.ocm Cos (1.3χ-5 5+) o- 55 rad/sec S is veloci is waveltnght le= 55 = 42.31 m/sec Ar,

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