Answer:c>a>b
Explanation:
Given
All the engine extracts same amount of heat(Q) from High-temperature reservoir
For a) 400 and 500 K
For b)500 K and 600K
For c) 400 K and 600 K
So c will give the highest amount of work
c>a>b
GPE=mass*GFS*height
2kg*9.8N/Kg*40m -I've used the Grabitational field strength of the earth's
surface
=784J
Distance= Speed x Time Distance= 1.9m/s x 3.5h= 6.5km
I think this is right and I hope this helped you! :)
The conservation of energy a ball rolling down a hill is that the ball is in motion because it is moving
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