A wave is described by y = 10 sin (4.0 $\pi$t - 6.0 $\pi$x). If the equation is in SI units with the units suppressed, what is its speed?
A) 2/3 m/s
B) 3/2 m/s
C) 1/6 m/s
D) 1/4 m/s

Question

Quizplus · Accepted Answer

The wave speed v can be found using the formula v = ω/k, where ω is the angular frequency and k is the wave number. From the equation, ω = 4π and k = 6π, so v = (4π)/(6π) = 2/3 m/s.

A Wave Is Described by Y = 10 Sin (4 π\piπ

A Wave Is Described by Y = 10 Sin (4 $\pi$