Four Waves Are Described by the Following Equations,where Distances Are

question 36

Multiple Choice

Four waves are described by the following equations,where distances are measured in meters and times in seconds.
I.y = 0.12 cos(3x - 21t)
II.y = 0.15 sin(6x + 42t)
III.y = 0.13 cos(6x + 21t)
IV.y = -0.23 sin(3x - 42t)
Which of these waves have the same speed?

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

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Definitions:

Iron Ore

A natural mineral or rock from which iron can be profitably extracted, typically rich in iron oxides.

Caldera

A large volcanic crater typically formed by a major eruption leading to the collapse of the mouth of the volcano.

Metal-Rich Fluids

Liquids that contain high concentrations of metals, often found in geological settings where they can deposit valuable ore minerals.

Limestone

A sedimentary rock primarily composed of calcium carbonate (CaCO3), often formed from marine organisms' shells.