SAT Subject Physics Practice Question 536: Answer and Explanation
The idealized P-V diagram above shows a complete cycle through compression and expansion of a gas. The questions below relate to the processes within the cycle.
Which letter shows isothermal compression?
Correct Answer: C
The correct answer is (C). The part of the cycle represented by the letter C is compression. During compression, the system heat is kept constant by allowing heat to escape from the system.