A Particle Physicist Observes Cosmic Rays Creating a New Particle $99.7 \%$

question 9

Multiple Choice

A particle physicist observes cosmic rays creating a new particle high in the atmosphere, and the speed of this particle is measured at $99.7 \%$ the speed of light. It is unstable, and is observed to decay in an average $37.0 \mu \mathrm { s }$ . If this particle were at rest in the laboratory, what would be its average lifetime?

• A) \(4.3 \mu \mathrm { s }\)
• B) \(12 \mu \mathrm { s }\)
• C) \(5.3 \mu \mathrm { s }\)
• D) \(2.9 \mu \mathrm { s }\)
• E) \(18 \mu \mathrm { s }\)

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Definitions:

Contractual Arrangement

An agreement between two or more parties that is enforceable by law.

Loss of Control

Refers to the event where an entity no longer has the power to govern the financial and operating policies of another entity to obtain benefits from its activities.

Other Comprehensive Income

Other comprehensive income includes revenues, expenses, gains, and losses that are not included in net income and are directly recorded to equity, reflecting the company's total comprehensive income.

AASB 127

A standard issued by the Australian Accounting Standards Board that deals with consolidated and separate financial statements.