One of the most efficient engines built so far has the following characteristics: The combustion chamber temperature is 1900C, the exhaust temperature = 430C, 7.0 x 109 cal of fuel produces 1.4 1010 J of work in one hour. (1 cal = 4.186 J) 1. What is the actual efficiency of this engine? 2. What is the wasted energy in one hour? 3. What would be the maximum possible efficiency for an engine using the same temperature extremes? dit View Insert Format Tools Table 12pt v V Paragraph B I U A A T v |