The Figure Shows Two Sets of Waves, Created by Two

question 81

Multiple Choice

The figure shows two sets of waves, created by two sources labeled "A" and "B." The solid
Half- circles represent wave crests from A, and the dashed half- circles represent wave crests from B. Suppose that individual wave crests from either source A or source B alone are 3 mm above the level of the undisturbed water. Then the displacement of the water [above or below the level of the undisturbed water] at the point marked "x" [with the arrow pointing toward it] is

• A) - 3 mm.
• B) +6 mm.
• C) 0 mm.
• D) - 6 mm.
• E) +3 mm.

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