Take gravity you are accelerated toward the ground. Since gravity has both a direction and a magnitude, then it is a vector.
Answer:
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Answer:
Your answer should be B. Cooled air
Explanation:
Answer: The thermal efficiency of the engine is 41.09 %.
Explanation:
Efficiency is the ratio of the useful work performed to the total energy expended or heat taken in.
Formula for thermal efficiency of engine is

= efficiency
= heat rejected = 266.7 kJ
= heat extracted = 452.8 kJ
Putting in the values we get:



The thermal efficiency of the engine is 41.09 %.
The become more negative hope this helps!:))