The Half-Life of Cobalt-60 Is 5

question 14

Multiple Choice

The half-life of cobalt-60 is 5.3 years,while that of strontium-90 is about 29 years.Suppose you have samples of both isotopes,and that they initially contain equal numbers of atoms of these isotopes.How will the activities (number of decays per second) of the samples compare?

• A)The activity of the cobalt-60 sample will be greater.
• B)The activities cannot be compared without more information.
• C)The activities will be equal.
• D)The activity of the strontium-90 sample will be greater.

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Definitions:

Transformational Leadership

A leadership approach that causes change in individuals and social systems, inspiring followers to exceed their own self-interests for the good of the organization.

Inspirational Motivation

Leadership behaviors that promote commitment to a shared vision of the future.

Shared Vision

A common view or goal agreed upon by a group or organization, which inspires members to collectively work towards its realization.

Transformational Leader

A leader who inspires followers to transcend their own self-interests for the good of the organization and who is capable of having a profound and extraordinary effect on his or her followers.