A Fire Engine Approaches a Wall at 5 M/s While

question 69

Multiple Choice

A fire engine approaches a wall at 5 m/s while the siren emits a tone of 500 Hz frequency. At the time, the speed of sound in air is 340 m/s. How many beats per second do the people on the fire engine hear?

• A) 0
• B) 15
• C) 29
• D) 63
• E) 250

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Definitions:

Accounts Receivable

Accounts receivable refers to the amount of money that customers owe to a company for goods or services that have been delivered but not yet paid for.

Cash

Liquid currency and assets readily convertible into cash, used to fund day-to-day operations and transactions.

Liquidity

A measure of how easily assets can be converted into cash without losing value.

Obligations

Responsibilities or duties bound by law or contract that one party owes another, including the repayment of debts or fulfilling contractual agreements.