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1. The jib crane is designed for a maximum capacity of 10 kN, and its uniform I-beam has a mass of 200 kg. (a) Plot the magnitude R of the force on the pin at A as a function of x through its operating range of x = 0.2 m to x = 3.8 m. On the same set of axes, plot the x- and y-components of the pin reaction at
(b) Determine the minimum value of R and the corresponding value of x.
(c) For what value of R should the pin at A be designed? (Use g = 10 m/s2.)
2. Two traffic signals are attached to the 36-ft sup- port cable at equal intervals as shown. Determine the equilibrium configuration angles a, /3, and y, as well as the tension in each cable segment
3. The two traffic signals of Prob. 2 are now repositioned so that segment BC of the 36-ft support cable is 10 ft in length and is horizontal. Specify the necessary lengths AB and CD and the tensions in all three cable segments.
In a reheat rankine cycle, steam enters the turbine at 4 MPa and 400 C. After expanding to 400 kPa, the steam is reheated again to 400 C, and expands in the low pressure turbine to 10 kPa. If the efficiency of the turbine and the pump is 100% and the..
A piston cylinder device contains nitrogen gas as the system. Initially, the system is at 1.5MPa and 470 °C. It now undergoes an isobaric process until its temperature is 25°C. Determine the final pressure and the heat transfer, in kJ/kg, associated ..
A small 6-mm diameter pin was designed using ASTM no. 40 cast iron to withstand an axial compressive load of 3.5kN combined with a tensional load of 9.8 N.m. Calculate the factor of safety the designer m must have used.
Gas in a closed system undergoes the power cycle as shown in the p-v diagram below as described by 1->2 is a constant pressure process, 2-> 3 is a constant volume process and 3 -> 1 is a pV = const. process. The internal energy U1 = U2 = 30 kJ/kg and..
learning goal to determine cartesian force components from magnitude and determine position and resultant vectors by
an air-standard otto cycle operates with 520 degrees r and 14.7 psia at the beginning of the compression portion of the
the yield stress of a tension specimen machined from a 0.5 m wide by 0.6 cm thick copper sheet is 145 mpa. the sheet is
atmospheric air at 10 psia and 70 f dry bulb has a relative humidity of 50. if the air is sensibly heated at a
methane at 77 f 1 atm enters an insulated reactor operating at steady state and burns with the theoretical amount of
Air in a piston-cylinder device is compressed from an initial state (temperature = 80 °C, pressure = 100 kPa, volume = 0.3 m3) to a final state (temperature = 250 °C, pressure = 600 kPa), during a polytropic process (n = 1.28094065700868). What is th..
1. Suggest six reasons why software dependability is important in most sociotechnical systems. 2. What are the most important dimensions of system dependability?
the work and the heat per degree change of temperature for a system executing a non-flow process are given by dwdt 80
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