Two In-Phase Loudspeakers That Emit Sound with the Same Frequency

question 215

Multiple Choice

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 air is 343 m/s.

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

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Definitions:

MARS Model

A framework identifying four critical factors—Motivation, Ability, Role Perceptions, and Situational factors—that determine an individual's work performance.

Schwartz's Model

A theory of human values that identifies ten broad motivational types of values, showing how they are related and influence individual behavior.

Distributive Justice

Refers to perceptions of fairness in the allocation of resources and outcomes within social and organizational contexts.

Goal-Directed

Activities or behaviors that are initiated with the intention of achieving a specific objective or outcome.