Question

No engine is perfectly efficient because?

A.society does not need efficient engines.
B.most fuel sources create environmental damage.
C.efficiency is not a goal in most engineering projects.
D.some energy will be lost to its surroundings when running.

Answer 1

d

Step-by-step explanation:

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Answer 2

b. most fuel sources create environmental change (the process of making the efficient engine will still create environmental damage)