Aboeing 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 ft^2. 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?

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.