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?

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false