Why Might Coating a Metal with Another Metal That Is

question 7

Multiple Choice

Why might coating a metal with another metal that is harder to oxidize prevent the first metal from being oxidized?

• A)It doesn't prevent it, but helps to slow it down.
• B)All of the oxidizing agent is consumed using up the easily oxidized metal.
• C)The metal that is coated is protected from moisture and oxygen so it doesn't react.
• D)The metal that is acting as the coating is protected from moisture and oxygen.
• E)all of the above

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Definitions:

Alpha

The pre-determined significance level in hypothesis testing, often set at 0.05, which defines the likelihood of observing a result at least as extreme as the one seen in the sample data if the null hypothesis is true.

T-statistic

A type of statistic used in hypothesis testing, calculated as the ratio of the departure of an estimated parameter from its hypothesized value to its standard error.

Critical Value

A threshold in hypothesis testing, which the test statistic must exceed to reject the null hypothesis.

Level of Significance

A threshold in hypothesis testing, below which the null hypothesis is rejected, commonly set at values like 0.05 or 0.01.