Two Sinusoidal Waves, Each of Wavelength 5 M and Amplitude

question 69

Multiple Choice

Two sinusoidal waves, each of wavelength 5 m and amplitude 10 cm, travel in opposite directions on a 20-m stretched string which is clamped at each end.Excluding the nodes at the ends of the string, how many nodes appear in the resulting standing wave?

• A)3
• B)4
• C)5
• D)7
• E)8

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Definitions:

Framing

The process of presenting or constructing a concept, idea, or issue in a certain way to influence perception and judgment.

Representativeness Heuristic

A mental shortcut that involves judging the likelihood of an event or situation by comparing it to an existing prototype that already exists in our minds.

Confirmation Bias

The tendency to search for, interpret, favor, and recall information in a way that confirms one’s preexisting beliefs or hypotheses.

Mental Sets

A tendency to solve problems using methods that have worked in the past rather than considering new approaches.