Interference: Two In-Phase Loudspeakers That Emit Sound with the Same

question 58

Multiple Choice

Interference: Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 8.00 m. A person is standing 12.0 m away from the wall, equidistant from the loudspeakers. When the person moves 3.00 m parallel to the wall, she experiences destructive interference for the second time. What is the frequency of the sound? The speed of sound in the room is 343 m/s. CAREFUL! The distance to the wall is NOT much greater than the distance between the speakers.

• A) 278 Hz
• B) 422 Hz
• C) 452 Hz
• D) 562 Hz
• E) 694 Hz

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Definitions:

Biologically Dominated Organism

An organism whose behavior and characteristics are predominantly determined by genetic and biological factors.

Proprium

In psychology, particularly in the theories of Alfred Adler, it refers to the core aspects of an individual's personality and sense of self.

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A term used by psychologist Gordon Allport to describe aspects of a person's self that are seen as central to their personality or identity.

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