One Source of Sound Is at a and Another

question 77

Multiple Choice

One source of sound is at A and another is at B. The two sources are in phase. The distance AB = 10.0 m. The frequency of the sound waves from both sources is 1000 Hz, and both have the same amplitude. The speed of sound in air is 330 m/s. A receiver is at point C, and AB is perpendicular to AC. The greatest distance AC for which the signal at C is a minimum is

• A) 33.0 cm
• B) 152 m
• C) 330 m
• D) 303 m
• E) 100 m

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Definitions:

High-low Method

A technique used in managerial accounting to estimate variable and fixed cost components of a cost formula, using the highest and lowest levels of activity.

Electrical Cost

Expenses associated with the consumption of electricity by a company, home, or another facility, impacting operational budgets.

Fixed Portion

The part of a cost or expense that remains constant regardless of changes in the level of activity or volume of production.

Variable Selling

Selling expenses that change in proportion to the volume of sales, such as commissions.