A Sample of U²³⁵ That Is Below the Critical Mass

question 26

Multiple Choice

A sample of U²³⁵ that is below the critical mass will not sustain a chain reaction because

• A) too many neutrons escape through the surface of the sample without initiating fission.
• B) the inertia of the sample is too low for efficient fission.
• C) nuclei repel each other due to their positive charges.
• D) the heat produced by the spontaneous fission of some nuclei is insufficient.

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Definitions:

Accrual Basis

An accounting method where income and expenses are recorded when they are earned or incurred, regardless of when the cash transaction happens.

GAAP Constraint

Guidelines that restrict or limit certain accounting practices under Generally Accepted Accounting Principles, to ensure fairness, consistency, and accuracy in financial reporting.

Disbursement Basis

Accounting method where expenses are recorded when cash is paid out, rather than when incurred.

CICA Handbook

The comprehensive guide published by the Canadian Institute of Chartered Accountants detailing accounting practices and standards in Canada.