A Train Moving at a Constant Speed Is Passing a Stationary

question 1

Multiple Choice

A train moving at a constant speed is passing a stationary observer on a platform. On one of the train cars, a flute player is continually playing the note known as concert A (f = 440 Hz) . After the flute has passed, the observer hears the sound with a frequency of 415 Hz. What is the speed of the train? The speed of sound in air is 343 m/s.

• A)7.3 m/s
• B)12 m/s
• C)21 m/s
• D)37 m/s
• E)42 m/s

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Private Consumption

The total value of all goods and services consumed by households and individuals within an economy, excluding government spending and investments.

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The total amount spent on purchases of new capital assets plus replacement of worn-out or obsolete assets.

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The total domestic and foreign output claimed by residents of a country, including wages, salaries, and property income.

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The sum value in currency or market terms of every finished product and service created within a country during a specified period.