1. An aluminum wing on a passenger jet is 27 m long when its temperature is 19°C.
At what temperature would the wing be 8 cm (0.08 m) shorter?
2. A proposed ocean thermal energy conversion (OTEC) system is a heat engine that would operate between warm water (18°C) at the ocean's surface and cooler water (4°C) 1,005 m below the surface. What is the maximum possible efficiency of the system? Enter your answer accurate to two decimal places. %?
3. What is the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water? (%)