Two In-Phase Loudspeakers Are Placed Along a Wall and Are

question 49

Multiple Choice

Two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m.They emit sound with a frequency of 514 Hz.A person is standing away from the wall,in front of one of the loudspeakers.What is the closest nonzero distance from the wall the person can stand and hear constructive interference? The speed of sound in air is 343 m/s.

• A)0.34 m
• B)0.73 m
• C)1.2 m
• D)1.6 m

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Definitions:

Inventory Turnover

A measure of how many times a company's inventory is sold and replaced over a certain period of time.

Interval Measure

A statistical metric used to express the amount of variance or uncertainty between data points in a series.

Receivable Turnover

A financial ratio that measures how efficiently a company uses its assets by calculating how many times a company can turn its accounts receivable into cash during a period.

Quick Ratio

A measure of a company's ability to meet its short-term obligations with its most liquid assets, calculated as (Cash + Marketable Securities + Receivables) / Current Liabilities.