An automobile engine takes in 4000 J of heat and performs 1100 J ...

[cmoore54]

An automobile engine takes in 4000 J of heat and performs 1100 J of mechanical work in each cycle. (a) Calculate the engine's efficiency. (b) How much heat is wasted in each cycle?
 
  What will be an ideal response?

Question 2

If the potential in a region is given by V(x,y,z) = xy - 3z-2, then the y component of the electric field in that region is
 
  A) x + y - 6z-3.
  B) -y.
  C) -x.
  D) x + y.

[thall411]

Answer to Question 1

(a) 27.5 (b) 2900 J

Answer to Question 2

C

[cmoore54]

Wow, this really help

[nothere]

Thanks for the timely response, appreciate it