Immediately upon leaving an airport, an airplane flies 200 km southwest then turns and flies 200 km due east after which it is forced to make an emergency landing. If you were to direct a rescue plane from the departing airport, what heading would you recommend that it follow in order to reach this downed craft in the least possible time?

What belongs in the areas marked x and y? x: the internal energy of a piston system increases as heat is added and rises to a cool area y: as thermal energy is added to a container, some of the energy is lost to the environment x: as thermal energy is added to a container, some of the energy is lost to the environment y: the internal energy of a piston system increases as heat is added and rises to a cool area x: a cold spoon placed in hot liquid gets warmer y: thermal energy is converted to light energy x: thermal energy is converted to light energy y: a cold spoon placed in hot liquid gets warmer