Carnot Engine: An ideal Carnot heat engine has an efficiency of 0.600. If it operates between a deep lake with a constant temperature of 294.0 K and a hot reservoir, what is the temperature of the hot reservoir?
A. 735 K
B. 490 K
C. 470 K
D. 784 K
Answer: A
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What is the maximum number of eclipses that can occur in a year?
A. 7 (four solar and three lunar) B. 4 (two solar and two lunar) C. 2 (one solar and one lunar) D. 7 (five solar and two lunar) or 7 (four solar and three lunar) E. 7 (five solar and two lunar)
A boulder rolls off of a very high cliff. If you disregard air, while it is falling, its trajectory is never truly vertical
A) True B) False
A circuit contains two inductors of 6.0 mH inductance in parallel placed in series with an inductor of 8.0 mH inductance. After one of the 6.0 mH inductors burns out, the repairman wants to replace all three inductors with one inductor of equivalent inductance. Assuming inductors combine in series and parallel the same way resistors do, what inductance should he use?
a. 3.0 mH b. 3.4 mH c. 4.8 mH d. 11 mH e. 20 mH
In the tree of life
A) animals are members of the domain Eukarya, while plants are members of the domain Archaea B) animals are members of the domain Archaea, while plants are members of the domain Eukarya C) both plants and animals are members of the domain Archaea D) both plants and animals are members of the domain Eukarya