On july 23, 1983, air canada flight 143 required 22,300 kg of jet fuel to fly from montreal to edmonton. the density of jet fuel is 0.803 g/ml, or 1.77 lb/l. the plane had 7682 l of fuel on board in montreal. the ground crew there multiplied the 7682 l by the factor 1.77(without units) and concluded that they had 13,597 kg of fuel on board and needed an additional 8703 kg by the factor 1.77(again without units) and concluded they needed to add 4916 l of fuel. they added 5000l. on its flight, the plane ran out of fuel and crash-landed near winnipeg, hundreds of kilometers short of its destination. (there were few injuries and no fatalities.) what mistake did the ground crew make? how much fuel(in l) should they have added before takeoff?

Acommercial grade cubical freezer, 4 m on a side, has a composite wall consisting of an exterior sheet of 5.0-mm thick plain carbon steel (kst= 60.5 w/m k), an intermediate layer of 100-mm thick polyurethane insulation (kins 0.02 w/m k), and an inner sheet of 5.0- mm thick aluminium alloy (kal polyurethane insulation and both metallic sheets are each characterized by a thermal contact resistance of r 2.5 x 104 m2 k/w. (a) what is the steady-state cooling load that must be maintained by the refrigerator under conditions for which the outer and inner surface temperatures are 25°c and -5°c, respectively? (b) for power saving purpose, which wall material should be increased/reduced in. thickness in order to reduce 50% of the cooling load found in part (a)? redesign the thickness of the proposed material. 177 w/m-k). adhesive interfaces between the q=575.93 w