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A jet airplane with a mass of 5 Mg has a touchdown speed of 300 km/h, at which instant the braking parachute is deployed and the power shut off. If the total drag on the aircraft varies with velocity as shown in the accompanying graph, calculate the distance x along the runway required to reduce the speed to 150 km/h. Approximate the variation of the drag by an equation of the form D = kv2 where k is a constant.
A line passes through the points (20m, 16m) and (-1m, -4m). Determine the perpendicular distance d from the line to the origin O of the system of coordinates.
Draw the influence line for the support reaction at A and calculate the support reaction at point
A room 7m x 6m x 3m high is to be electically heated to maintain the inside temperature at 20 C, when it is 0 C outside. The room has 2 windows each 1.2m x 1.8m and a sliding glass door 2.4m x 2.1m.
A 3105 Aluminum alloy wire is to be drawn to give a 1-mm diameter wire having a yield strength of 20,000 PSI. assume that there is no friction in the wire drawing process
Disregarding traction limitations, what is the maximum value of rolling resistance (in lb/ton) over which the fully loaded unit can maintain a speed limit of 15 mph?
Determine the uniform flow depth in a rectangular channel 2.5 m wide with a discharge of 3 m3/s. The slope is 0.0004 and Manning's roughness coefficient is 0.015
how long does it take for the truck to move 4 m up the incline?
A thin-walled cylindrical tank of radius r is subjected simultaneously to internal pressure p and a compressive force P through rigid end plates. Determine the magnitude of force P to produce pure shear in the cylindrical wall.
A Fe-.25 w/o Carbon alloy is sloly cooled to 700 degrees C. What is the composition of the Ferrite(alfa) phase and what is the compositon of the cementite(Fe3C) phase. Whate are the relative fractions of ferrite and cementite
The post is embedded into a concrete footing so that it is fixed supported. If the reaction of the concrete on the post can be approximated by the distributed loading, determine the intensity of w1 and w2
The water table is 7m below the surface of the sand. The saturated unit weight of the sand is 19kN/m3 and that of the clay 20kN/m3; the unit weight of the sand above the water table is 16kN/m3.
vehicle manufacturer is considering an engine for a new sedan (Cd=0.34, Af=22ft^2). the car is being designed to achieve a top speed of 100 mi/h on a paved surface at sea level (p=0.002378 slugs/ft^3).
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