A Train Sounding Its Horn Is Moving Toward an Observer

question 103

Multiple Choice

A train sounding its horn is moving toward an observer. The pitch of the horn's sound relative to its normal pitch is

• A) lower.
• B) sometimes higher and sometimes lower.
• C) higher.
• D) the same.

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Definitions:

Volatile

Describes an investment or market that shows frequent and significant price changes over a short period of time.

Nominal Rate of Interest

The rate of interest before adjusting for inflation, reflecting the rate at which money grows over time.

Purchasing Power

A measure of the amount of goods or services that one unit of currency can buy.

Inflation Rate

The annual percentage rate at which the general level of prices for goods and services is rising, eroding purchasing power.