3. (10 pts) Suppose an airplane with its engine off has a maximum lift-to-drag ratio of 14, and its CL at max lift to drag ratio is 0.64. Its weight is 3,000 lb, and its wing area is 175 ft2. Determinea) The minimum glide angleb) The maximum range along the ground, starting from an altitude of 10,000 ft. c) When gliding at the minimum glide angle, determine the velocity at an altitude of 10,000 ft and at an altitude of 2,000 ft.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k

The proportional limit is always greater than the yield strength for a material. a)-trune b)- false