The Activity of a Radioactive Sample Is the Number of Decay

question 115

Multiple Choice

The activity of a radioactive sample is the number of decay events per second. The SI unit of activity is the becquerel (1 Bq = 1/s) . An older unit for activity is the curie (1 Ci = 3.70 x10¹⁰/s) . What is the activity in Bq of a sample with an activity of 47 µCi of radiation?

• A) 7.9 x10² Bq
• B) 7.9 x 10⁸ Bq
• C) 1.7 x 10¹² Bq
• D) 1.7 x 10⁶ Bq
• E) 1.3 x 10^-16 Bq

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Definitions:

Direct Labour Hours

The total hours worked by employees directly involved in the manufacturing process, contributing to the transformation of raw materials into finished goods.

Unfavourable Variance

A financial term indicating that actual results are worse than expected or budgeted results, leading to a negative impact on profitability.

Sales Volume Variance

A metric used in budgeting and accounting to measure the difference between the actual quantity sold and the expected sales volume, indicating the impact on profit.

Variable Costing

An accounting method that only includes variable production costs (materials, labor, and variable overhead) in product costs and treats fixed overhead as a period expense.