The Material Used in Certain Nuclear Bombs Is ²³⁹Pu, Which

question 42

Multiple Choice

The material used in certain nuclear bombs is ²³⁹Pu, which has a half-life of about 20,000 years. How long must we wait for a buried stockpile of this substance to decay to 4.0% of its original ²³⁹Pu mass?

• A) 93,000 y
• B) 64,000 y
• C) 45,000 y
• D) 800 y

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Definitions:

Universal Propositions

Claims or statements that assert something about every member of a particular category or class without exception.

Particular Propositions

Statements in logic that affirm or deny something about only some members of a class or category.

Non-categorical

Pertaining to expressions or statements that do not fit into the traditional categories of logic, or that do not assert a logical category.

Proposition

A statement expressing something that can be either true or false.