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Homework Statement
8. Four wave functions are given below. Rank them in order of the magnitude of the wave
speeds, from least to greatest.
I. y(x,t) = 5sin(4x − 20t + 4)
II. y(x,t) = 5sin(3x −12t + 5)
III. y(x,t) = 5cos(4x + 24t + 6)
IV. y(x,t) =14cos(2x − 8t + 3)
(A) IV, II, I, III
(B) IV = II, I, III
(C) III, I, II, IV
(D) IV, I, II=III
(E) III, IV, II, I
Homework Equations
The Attempt at a Solution
I don't know how to go about this!