Answer:
(a) 17450.8 J (B) 1.239 sec
Explanation:
We have given power output =8 KW
Heat expelled = 10994 j
Efficiency =37% = 0.37
(A) We know that efficiency 

Heat input =17450.8 J
(B) Work done by the engine is = 17450.8-10994=6456.8 j
Power output is given by 8 KW =8000 W
So time for each cycle is 
Answer:
This is very true
Explanation:
The force from impact can easily change it to expanse in a different direction.
I hope this helped you very much :)
Think of a car, when we have to add oil. If we didn't then the friction would cause so much heat that the engine would break and fall apart.
Answer:
154 N horizontal (to the right) 15.9 N vertical (up)
Explanation:
I got it right :)
I believe the best answer is B