What Is the Frequency Does a Stationary Observer Hear When

question 441

Multiple Choice

What is the frequency does a stationary observer hear when a train approaches her with a speed of 30 m/s. The frequency of the train horn is 0.600 kHz and the speed of sound is 340 m/s.

• A) 551 Hz
• B) 653 Hz
• C) 600 Hz
• D) 658 Hz

---

Definitions:

National Saving

The total amount saved by the government, households, and the business sector in an economy.

Net Capital Outflow

The difference between the purchase of domestic assets by foreigners and the purchase of foreign assets by domestic residents over a specific period, reflecting the flow of capital out of and into a country.

Buy American Campaign

A movement encouraging consumers to purchase goods made in the United States in order to support domestic businesses and labor.

Trade Balance

The difference between a country's exports and imports of goods and services.