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:

Actin Filaments

Protein fibers that play a critical role in cell movement and shape, and are a major component of the cell's cytoskeleton.

Muscle Cells

Specialized cells that make up muscle tissue and have the ability to contract, allowing for movement and force generation in the body.

Myosin

Myosin is a type of motor protein involved in muscle contraction and movement of various types of cells and organelles in the cytoplasm.

Cyanobacteria

Photosynthetic bacteria that produce oxygen and are found in aquatic and terrestrial environments.