First Law of Thermodynamics: When a Fixed Amount of Ideal

question 11

Multiple Choice

First law of thermodynamics: When a fixed amount of ideal gas goes through an isothermal expansion,

• A) its internal (thermal) energy does not change.
• B) the gas does no work.
• C) no heat enters or leaves the gas.
• D) its temperature must decrease.
• E) its pressure must increase.

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Definitions:

Contribution Margin

The amount remaining from sales revenue after variable expenses have been deducted.

Variable Cost

A cost that changes in proportion to the level of activity or volume of production in a business.

Gross Margin

The difference between sales revenue and the cost of goods sold, expressed as a percentage of sales.

Absorption Costing

A method of inventory costing that includes all manufacturing costs, both variable and fixed, in the cost of a product.