A Fluid in an Insulated, Flexible Bottle Is Heated by a High

question 9

Multiple Choice

A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If $9.0 \mathrm {~kJ}$ of heat is applied to the system and it does $5.0 \mathrm {~kJ}$ of work, how much does the internal (thermal) energy of the fluid change?

• A) 4.0 kJ
• B) 14 kJ
• C) -4.0 kJ
• D) 45 kJ

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Definitions:

Profit Maximized

The point at which a firm's profit is at its highest because marginal cost equals marginal revenue.

Total Cost

The complete cost of production, including both fixed costs that do not change regardless of the output level and variable costs that increase or decrease with the level of production.

Perfectly Competitive

A market structure characterized by numerous small firms, identical products, and free entry and exit, leading to firms being price takers.

Marginal Revenue

The supplementary earnings obtained through the sale of one more unit of any good or service.