Two In-Phase Loudspeakers Are Placed 6

question 19

Multiple Choice

Two in-phase loudspeakers are placed 6.00 m apart along one wall of a room. They emit sound with a frequency of 512Hz. Starting at the location of one of the loudspeakers, a microphone is moved in a direction perpendicular to the wall until constructive interference is detected for the first time. How far is the microphone from the wall at that point? The speed of sound in air is 330 m/s.

• A)0.141 m
• B)0.664 m
• C)0.203 m
• D)0.138 m
• E)0.282 m

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Definitions:

Self-recognition

The ability of an individual to recognize themselves as an independent entity, often tested through mirror recognition tasks.

Self-awareness

An understanding of one's personal traits, sentiments, driving factors, and aspirations.

Self-recognition

The cognitive ability to recognize oneself in a mirror or photograph, often considered a milestone in self-awareness and identity development.

Categorical Self

A classification of the self children use to guide their behavior; based on broad ways in which people differ, such as sex, age, and physical characteristics.