You Are Sitting near the Back of a Twin-Engine Commercial

question 25

Multiple Choice

You are sitting near the back of a twin-engine commercial jet airliner,which has the engines mounted on the fuselage near the tail.The nominal rotation speed for the turbofan in each engine is 5200 revolutions per minute,which is also the frequency of the dominant sound emitted by the engine.If one engine is running at 5214 revolutions per minute and the other at 5385 revolutions per minute,the passengers hear a pulsing noise that repeats every

• A)5.8 * 10^-3 s
• B)0.35 s
• C)0.70 s
• D)0.18 s
• E)0.025 s

---

Definitions:

Secondary Data

Information that has been previously collected and published by others, used for research or analysis.

Census Data

Information collected through a comprehensive survey of a population, detailing demographic, social, and economic profiles.

Trade Association

is an organization founded and funded by businesses that operate in a specific industry, aimed at promoting their collective interests.

Powerade Customers

Individuals or groups who purchase Powerade, a brand of sports drink designed to rehydrate and replenish electrolytes.