A Sound Source Emits 20

question 4

Multiple Choice

A sound source emits 20.0 W of acoustical power spread equally in all directions.The threshold of hearing is .What is the sound intensity level 30.0 m from the source?

• A) 92.5 dB
• B) 81.5 dB
• C) 1.77 × 10^-3 dB
• D) 1.77 × 10^-3 W
• E) -27.5 dB

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Definitions:

Subsidiary Ledger

A detailed ledger that provides a breakdown of information summarized in a controlling account in the general ledger.

Control Account

An account used in the general ledger to summarize the details of transactions recorded in subsidiary ledgers.

Subsidiary Ledger

A detailed ledger containing all the individual accounts related to a particular area, such as accounts receivable or accounts payable, which supports the totals recorded in the general ledger.

Control Account

A summary account in the general ledger that aggregates the details recorded in a subsidiary ledger for similar transactions, such as accounts receivable or payable.