While You Are Standing on a Corner,a Police Car with a 1-KHz

question 24

Multiple Choice

While you are standing on a corner,a police car with a 1-kHz siren drives past you at 30 m/s with its siren on.The speed of sound is 340 m/s.After the car has passed,the frequency you hear is about

• A)1.10 kHz
• B)1.09 kHz
• C)1.00 kHz
• D)919 Hz
• E)912 Hz

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The difference between the revenue generated from sales and the cost of goods sold, before deducting overheads, payroll, taxation, and interest payments.

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A document issued by a seller to a buyer, reducing the amount owed by the buyer to the seller, typically due to a return or rebate.