Two Speakers Are Driven Exactly Out of Phase with Each

question 17

Multiple Choice

Two speakers are driven exactly out of phase with each other at 256 Hz. If a microphone placed on the line between the two speakers, exactly in the middle, detects no sound at all, then what is possibly the distance between the microphone and each speaker? The speed of sound is 340 m/s.

• A) 0.75 m
• B) 0.38 m
• C) Can be any distance at all
• D) 1.50 m
• E) 0.94 m

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Definitions:

Journal

An accounting record where all transactions are initially recorded using the double-entry bookkeeping system before they are transferred to accounts in the general ledger.

Debt Ratio

A financial ratio that measures the extent of a company’s leverage, calculated by dividing total liabilities by total assets.

Liabilities

Financial obligations a company owes to external parties, including loans, accounts payable, and mortgages.

Total Assets

The sum of all current and non-current assets owned by a company, reflecting the company’s total resources.