The Oxidation of Iron to Rust Is a Problem Structural

question 70

Multiple Choice

The oxidation of iron to rust is a problem structural engineers need to be concerned about, but the oxidation of aluminum to aluminum oxide is not. Why?

• A)Since aluminum is so light and inexpensive, it is easily replaced when corroded.
• B)Aluminum oxide is insoluble in water and thus forms a protective coating that prevents continued oxidation of the aluminum.
• C)Aluminum oxide is even stronger than aluminum.
• D)The oxidation of aluminum is a very slow reaction, taking hundreds of years before any structural changes are noticed.

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Definitions:

Money Demand

The desired holding of financial assets in the form of money; it is often associated with the level of liquidity preference.

Real Interest Rate

The interest rate adjusted for inflation, representing the true cost of borrowing or real yield on investment.

Value of Money

The purchasing power of currency, indicating the amount of goods or services that one unit of money can buy, which fluctuates over time due to inflation or deflation.

Quantity Theory

A theory in economics that addresses the relationship between the amount of money in an economy and the level of economic activity, asserting that the general price level of goods and services is directly proportional to the amount of money in circulation.