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1. A rectangular wing with an aspect ratio of 6 is to generate 1000 lb of lift when it flies at a speed of 200 ft/s. Determine the length of the wing if its lift coefficient is 1.0.
2. A 1.2-lb kite with an area of 6 ft2 flies in a 20-ft/s wind such that the weightless string makes an angle of 55° relative to the horizontal. If the pull on the string is 1.5 lb, determine the lift and drag coefficients based on the kite area.
one mole of an ideal gas at t 25 degc is held in a cylinder by a piston at a pressure of 1 x 107 pa. the piston
The atomic radius of iron is 0.129 nm and it has a bcc unit cell at room temperature and an fcc unit cell at high temperature. One of the largest void is located at (1/2,1/4,0) in the bcc unit cell, and at (0,1/2,0). Determine the diameter of the lar..
a system has an initial volume of 10 ft3 and expands to a final volume of 20 ft3. the initial pressure is 14.7 psi.
a 65 wt ni-35cu alloy is heated to temperature within the apha liqquid-phase region. if the compostiong of the alpha
a ships hull is 150m long as has a wetted area of 5000 m2. when it is encrusted with barnacles it requires 7000 hp to
In a yogurt-filling line the containers are filled with 1 kg of yogurt. The mass of the yogurt is measured while the filling nozzle is open. The nozzle flow rate is 0.20 Kg/sec. Several factors affect the flow rate, including the density and the visc..
Determine the distance to the centroid C of the composite area shown in the figure.
A high-speed NMOS microprocessor has a 64-bit address bus and performs a memory access every 50 ns. Assume that all address bits change during every memory access, and that each bus line represents a load of 10 pF.
Assume E=31 ,000 MPa and ν=0.2 εa=-222x10-6 , εb=-213x10-6 , εc=45x10-6 Where gauges a, b and c are in line with, at 450 to and perpendicular to the centroidal axis of the column, respectively.
The solid aluminum bar of circular cross section is fitted snugly between two immovable walls. Determine the temperature increase that would cause the bar to buckle. Use E = 10:3 × 106 psi and α = 12:8 × 106/°F for aluminum.
some bacteria are propelled by biological motors that spin hair-like flagella. a typical bacterial motor turning at a
A fan located within the tower draws in atmospheric air at 17°C, 0.098 Pa, 60% relative humidity with a volumetric flow rate of 110 m3/min. Saturated air exits the tower at 30°C, 0.098 MPa. The power input to the fan is 8 kW. Ignoring kinetic an..
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