A Sample of a Radioisotope Shows an Activity of 999

question 105

Multiple Choice

A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay.If after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?

• A)4.38 × 10^-2 yr
• B)11.4 yr
• C)0.25 yr
• D)15.8 yr
• E)9.1 yr

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Definitions:

Physical Therapy

A medical specialty that uses cold, heat, water, exercise, massage, traction, and other physical means to treat musculoskeletal, nervous, and cardiopulmonary disorders.

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Use of several Current Procedural Terminology codes for a service when one inclusive code is available.

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Involving or using deceit and deception to gain an unfair advantage or to deprive someone of a legal right.

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A set of internal policies and procedures implemented by a company to comply with laws, regulations, and ethical standards.