A Radioactive Isotope Decays by β^- Emission with a Half-Life

question 53

Multiple Choice

A radioactive isotope decays by β^- emission with a half-life of 1.0 min.During the first 1.0 min,a particular sample emits 1000 β^- particles.During the next 1.0 min,the number of β^- particles this sample will emit will be closest to

• A) 250.
• B) 500.
• C) 1000.
• D) 1500.
• E) 2000.

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Definitions:

Variable Overhead Efficiency Variance

The difference between the actual hours taken to produce something and the standard hours expected, multiplied by the variable overhead rate per hour.

Manufacturing Overhead

All indirect costs associated with manufacturing a product, excluding direct materials and direct labor costs.

Variable Overhead Rate Variance

The difference between the actual variable overhead incurred and the expected (or standard) cost based on the actual level of activity.

Variable Manufacturing Overhead

Overhead costs that fluctuate with the level of production, such as utilities or raw materials.