How Many ¹⁴C Atoms Are in a Charcoal Sample That

question 42

Multiple Choice

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For ¹⁴C, t_1/2 = 5,730 yr.)

• A) 2.9 * 10⁷ atoms
• B) 8.0 * 10^-7 atoms
• C) 1.4 * 10¹⁴ atoms
• D) 1.5 * 10¹³ atoms
• E) 6.02 * 10²⁰ atoms

Understand the dynamics of monsoons and their effects on regional climates.

Comprehend the role and workings of the thermohaline conveyor in global climate.

Identify the role of the Diagnostic and Statistical Manual of Mental Disorders (DSM) in the classification of psychological disorders.

Examine critical perspectives on the DSM and discuss alternatives or supplements to its approach.

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Definitions:

Homeostasis

is the process by which living organisms regulate their internal environment to maintain stable, optimal conditions despite external changes.

Drive-Reduction Theory

A theory of motivation suggesting that biological needs create internal states of tension or arousal—called drives—which organisms are motivated to reduce.

Biological Concept

Fundamental ideas or principles that relate to the biological sciences, encompassing a wide range of phenomena from genetic inheritance to evolution.

Arousal Theory

A theory of motivation suggesting that people are motivated to maintain an optimal level of alertness and physical and mental activation.