A System Initially Has an Internal Energy E of 501

question 21

Multiple Choice

A system initially has an internal energy E of 501 J. It undergoes a process during which it releases 111 J of heat energy to the surroundings, and does work of 222 J. What is the final energy of the system, in J?

• A) 168 J
• B) 390 J
• C) 612 J
• D) 834 J
• E) cannot be calculated without more information

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Definitions:

Barriers to Entry

Economic, procedural, regulatory, or technological factors that obstruct or restrict the ability of new competitors to enter a market.

Economic Profits

The surplus achieved when revenue generated from business activities exceeds both explicit and implicit costs.

Long Run

A period of time in which all factors of production and costs are variable, and firms can adjust all inputs.

Competitive Price-searcher

A market condition where sellers actively set prices and seek to differentiate their products in an effort to attract consumers in a competitive environment.