A 100-G Sample of Carbon from a Modern Source Gave 15

question 2

Short Answer

A 1.00-g sample of carbon from a modern source gave 15.3 disintegrations per minute.A sample of carbon from a presumably old source gave 920 disintegrations per hour.What is the age of the "old" sample of carbon? The half-life of carbon-14 is 5.73 * 10³ yr.

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Definitions:

Pygmalion Effect

The phenomenon in which higher expectations lead to an increase in performance.

Laboratory Observation

A research method in which subjects are observed in a controlled environment to gather data.

Naturalistic Observation

A research method involving observing subjects in their natural environment without interference.

Adult Participants

Individuals over the age of majority, often involved in studies, research, or activities requiring legal adulthood.