An Aircraft Travelling at Half the Speed of Sound Emits

question 6

Short Answer

An aircraft travelling at half the speed of sound emits sound at a frequency of 5000 Hz. At what frequency does a stationary listener hear the sound as the plane approaches, and after it passes by? Assume the aircraft is not flying very high.

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Definitions:

Accountant

A professional responsible for maintaining and interpreting financial records, ensuring accuracy and compliance with laws and regulations.

Net Present Value

The calculation used to find today’s value of a stream of future payments or receipts, by discounting them using a specific rate of return.

Investment

Investment refers to the allocation of resources, such as capital, time, or assets, with the expectation of generating profit or income, involving mechanisms like stocks, bonds, real estate, or other financial vehicles.

Present Value Factors

Multipliers used to calculate the present value of a future sum of money or stream of cash flows given a specific interest rate.