An Old 78 Rpm Record Rotates Through an Angle $320 ^ { \circ }$

question 88

Multiple Choice

An old 78 rpm record rotates through an angle of $320 ^ { \circ }$ as it slows down uniformly from 78.0 rpm to 22.8 rpm. What is the magnitude of the angular acceleration of the record?

• A) \(5.46 \mathrm { rad } / \mathrm { s } ^ { 2 }\)
• B) \(2.34 \mathrm { rad } / \mathrm { s } ^ { 2 }\)
• C) \(10.9 \mathrm { rad } / \mathrm { s } 2\)
• D) \(8.35 \mathrm { rad } / \mathrm { s } ^ { 2 }\)
• E) \(6.50 \mathrm { rad } / \mathrm { s } ^ { 2 }\)

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Definitions:

Labor Rate Variance

The difference between the actual cost of labor and the expected (or standard) cost, based on hours worked and pay rates.

Labor Efficiency Variance

The variance between the actual number of labor hours utilized and the anticipated standard labor hours for the achieved production volume.

Raw Materials Inventory

The stock of materials on hand that are used in the manufacturing process to produce goods.

Transaction (b)

Likely refers to a specific, numbered transaction within a set of financial records or accounting entries, without additional context provided.