Four Traveling Waves Are Described by the Following Equations,where All

question 25

Multiple Choice

Four traveling waves are described by the following equations,where all quantities are measured in SI units and y represents the displacement. I: y = 0.12 cos(3x + 2t)
II: y = 0.15 sin(6x - 3t)
III: y = 0.23 cos(3x + 6t)
IV: y = -0.29 sin(1.5x - t)
Which of these waves have the same speed?

• A) I and III
• B) I and IV
• C) II and III
• D) I and II
• E) III and IV