An Ancient Rock Is Found to Contain ⁴⁰Ar Gas,indicating That

question 2

Multiple Choice

An ancient rock is found to contain ⁴⁰Ar gas,indicating that 77% of the ⁴⁰K in the rock has decayed since the rock solidified.Any argon would have boiled out of liquid rock.How long ago did the rock solidify? The half-life of ⁴⁰K is 1.25 billion years.

• A)2.6 billion years
• B)0.5 billion years
• C)1.8 billion years
• D)0.3 billion years

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Definitions:

Physical Punishment

A disciplinary technique involving the infliction of bodily pain or discomfort to correct or punish a person's behavior.

Punisher's Intention

Describes the motive or goal behind punitive actions, often explored in psychological and criminological studies to understand the effects of punishment.

Dependent

Reliant on someone or something else for support, sustenance, or aid.

Decisions

The act of making choices between two or more possibilities.