An Ambulance Is Generating a Siren Sound at a Frequency

question 59

Multiple Choice

An ambulance is generating a siren sound at a frequency of 2,400 Hz. The speed of sound is 345.0 m/s. The observer is traveling at a velocity of 24.00 m/s toward the ambulance and the ambulance is traveling at a velocity of 20.00 m/s toward the observer. What is the frequency of the siren perceived by the observer?

• A) 2,489 Hz
• B) 2,560 Hz
• C) 2,675 Hz
• D) 2,725 Hz
• E) 2,830 Hz

Recognize the effects of progressive, proportional, and regressive taxes on different income levels.

Understand the concept and implications of the Laffer curve regarding tax rates and tax revenue.

Identify the actual beneficiary of a subsidy based on market conditions and statutory provisions.

Analyze how changes in income affect tax liability and tax rates.

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