& The Cessna 172 takes off successfully from an airport during a day in June (28 C) with a standard
pressure (102.3 kPa). Assume that the take-off speed is (105mph). How much drag is produced if
the coefficient of drag is 0.05 ? The Cessna wing area is 20.2 m2 and has a mass of 1,156 kg.
D = (C. Apv2)/2
Co= 0.05
A = 20.2 m2
V = 105 miles/hour
There are 1609.34 meters in a mile 105 * 1609.34/3600 meters/sec

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]