The Density of a Certain Metal Solid Is 7 ×

question 73

Multiple Choice

The density of a certain metal solid is 7 × 10³ kg/m³,and its Young's modulus is 13 × 10¹⁰ N/m².What is the speed of sound in this metal?

• A) 1.4 × 10⁷ m/s
• B) 4,400 m/s
• C) 4,300 m/s
• D) 4,000 m/s
• E) ​1.4 × 10³ m/s

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Definitions:

Product Costs

Product costs are the costs directly associated with the manufacturing of goods, including materials, labor, and overhead.

Period Costs

These are costs that are not directly tied to production and are expensed in the period they are incurred, such as selling, general, and administrative expenses.

Factory Overhead

All indirect costs associated with manufacturing, such as indirect labor, maintenance, and utilities, not directly tied to a specific product.

Direct Labor Hours

The total number of work hours spent by employees who directly manufacture or produce goods.