An important feature of the Carnot cycle is that
A) its efficiency can be 100.
B) its efficiency depends only on the absolute temperature of the hot reservoir used.
C) its efficiency is determined by the temperatures of the hot and cold reservoirs between which it works and by the properties of the working substance used, and on nothing else.
D) it is an example of an irreversible process that can be analyzed exactly without approximations.
E) no engine can be more efficient than a Carnot engine operating between the same two temperatures.
Question 2
A train starts from rest and accelerates uniformly until it has traveled 5.6 km and acquired a forward velocity of The train then moves at a constant velocity of for 420 s. The train then slows down uniformly at until it is brought to a halt.
The acceleration during the first 5.6 km of travel is closest to which of the following? A) 0.16 m/s2
B) 0.14 m/ s2
C) 0.17 m/ s2
D) 0.19 m/ s2
E) 0.20 m/ s2
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