A Radioactive Sample Has an Activity R

question 55

Multiple Choice

A radioactive sample has an activity R.For which of the following changes would the activity remain unchanged?​

• A)​The number of radioactive nuclei in the sample is doubled.
• B)​The half-life of the radioactive nuclei is doubled.
• C)​The decay constant is doubled.
• D)​A time period equal to two half-lives is allowed to elapse.
• E)​All of the above changes result in a change in the activity.

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Definitions:

Open-ended

Describes questions or formats that do not have a predefined range of answers, allowing for unrestricted responses.

Objective

Based on facts, independent of personal feelings or biases.

Respondent

An individual who answers questions or provides data as part of a survey or study.

Secondary Data

Information that has been previously collected and analyzed by others, utilized in research for purposes different from those for which the data were initially gathered.