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**1. Homework Statement**

A heat engine takes in 1030 J of energy at 1000 K and exhausts 585 J at 250 K. What are the actual and maximum theoretical efficiencies of this heat engine?

**2. Homework Equations**

For maximum efficiency I got 75 % by taking 1 - (250K / 1000K). For actual efficiency the equation is W/ Q or work out / heat in.

**3. The Attempt at a Solution**

I am not sure where to start on this problem and any help would be very nice!