Ariel Claims That a Pulse Is Described by the Equation

question 33

Multiple Choice

Ariel claims that a pulse is described by the equation where x and y are measured in cm and t in s. Miranda says that it is not possible to represent a pulse with this function because a wave must be a function of x + vt or x − vt. Which one, if either, is correct, and why?

• A)Ariel, because x2 - 6.0xt + 9t2 = (x - 3.0t)2.
• B)Ariel, because a pulse is not an infinite wave.
• C)Miranda, because (x - 3.0t)2 is the same as (3.0t - x)2.
• D)Miranda, because a pulse is not an infinite wave.
• E)Miranda, because is infinite when x = 0.

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