AP Physics 2mediummcq1 pt
A heat engine absorbs 1000 J from a hot reservoir and rejects 600 J to a cold one. Its efficiency is
A.40%
B.60%
C.100%
D.25%
Explanation
Core Concept
e = W/QH = (1000 − 600)/1000 = 0.40 = 40%.
Correct Answer
A40%
More Unit 2: Thermodynamics practice questions
- hardA Carnot engine's efficiency approaches 100% only if
- mediumA 1.0 kg block of aluminum (c = 900 J/kg·K) cools from 80 °C to 20 °C. The heat released is
- hardThe net work of a cyclic process equals
- hardA gas molecule's average speed doubles when its absolute temperature
- mediumWhich statement about temperature scales is correct?
Practice more AP Physics 2 questions with full explanations
Practice Unit 2: Thermodynamics Questions →