A Boeing 777 lands at Chicago O'Hare Airport (668 m elevation) where the pressure is 98.8 kPa. This 777 wing has a coefficient of lift of 1.46, and its wing area is 4618.8 ft2. When the plane left St. Louis, its mass was 225,982 kg. Note that kilograms is mass not weight, so you need to convert it. During the flight to Chicago, 7,534 liters of fuel was used, where the jet fuel weighs 0.781 kg/L. What is the velocity in miles-per-hour at the point where the aircraft initially touches the ground?

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.