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A counter-current double pipe heat exchanger (as shown in Figure 4) is constructed from stainless steel (thermal conductivity ks = 20 W m−1 K−1) and consists of an inner pipe with an inner diameter of di = 20 mm and an outer diameter of do = 24 mm. The outer pipe has an inner diameter of Di = 40 mm. The hot stream, an oil (mass flow rate 𝑚𝐻̇ = 2 kg s−1 , density ρH = 900 kg m−3 , heat capacity Cp,H = 1.8 kJ kg−1 K−1 , dynamic viscosity μH = 0.01 Pa s, and thermal conductivity kH = 0.15 W m−1 K−1) flows through the inner pipe with an inlet temperature of TH1 = 165 ºC and an exit temperature of TH2 = 115 ºC. The cold stream, water, flows through the annulus with an inlet temperature of TC1 = 15 ºC, an exit temperature of TC2 = 45 ºC, and a convective heat transfer coefficient of hwater = 5500 W m−2 K−1 .
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The device shown in Figure 3 is used to estimate the thermal conductivity of a new biomaterial by measuring the steady-state heat transfer rate and temperature. The biomaterial is wrapped around the cylindrical heating rod. The exposed ends of the device are sealed and insulated. A constant electrical power load is passed through the heating rod and dissipated as heat through the biomaterial layer and then through the surrounding air film layer to the bulk air. The temperature of the heating rod’s cylindrical surface is constant and equals to T0 (T = T0). For the present set of measurements, the diameter of the heating rod is D0 = 6 cm (radius R0 = 3 cm) and its height is L = 12 cm, the thickness of the biomaterial surrounding the heating rod is δ = 1 cm. The power load, which equals to heat transfer rate, is 𝑄̇ = 40 W. The measured surface temperature of the rod is T0 =80 ºC, and the temperature of the surrounding air remains constant at 𝑇∞ = 15 ºC. The convective heat transfer coefficient of the air film surrounding the biomaterial is h = 100 W m−2 K−1
Heat transfer

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A solid brass [E = 100 GPa] axial member is loaded and supported as shown in Figure. Segments (1) and (2) each have a diameter of 25 mm and segment (3) has a diameter of 14 mm. Determine: (a) the deformation of segment (2). (b) the deflection of joint D with respect to the fixed support at A. (c) the maximum normal stress in the entire axial member.
A solid brass [E = 100 GPa] axial member is loaded and supported as shown in Figure. Segments (1) and (2) each have a diameter of 25 mm and segment (3) has a diameter of 14 mm. Determine: (a) the ...

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Derive an expression for the confinement factor Γ of single-mode fibers defined as the fraction of the total mode power contained inside the core. Use the Gaussian approximation for the fundamental fiber mode. Estimate Γ for V = 2.

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Consider the partial resource-loading chart shown below. Suppose that you can commit a maximum of 8 resource hours per day; a. Choose the dates on which project resources are overallocated? b. How should the resource-loading table be manipulated to correct for this overallocation? c. Now suppose that the maximum number of resource hours per day you can commit is reduced to six. How would you reconfigure and construct the resource-loading table to adjust for this number? What would be the new project completion date
Consider the partial resource-loading chart shown below. Suppose that you can commit a maximum of 8 resource hours per day; a. Choose the dates on which project resources are overallocated? b. How should the resource-loading table be manipulated to correct ...

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Consider the partial resource-loading chart shown below. Suppose that you can commit a maximum of 8 resource hours per day; a. Choose the dates on which project resources are overallocated? b. How should the resource-loading table be manipulated to correct for this overallocation? c. Now suppose that the maximum number of resource hours per day you can commit is reduced to six. How would you reconfigure and construct the resource-loading table to adjust for this number? What would be the new project completion date
Consider the partial resource-loading chart shown below. Suppose that you can commit a maximum of 8 resource hours per day; a. Choose the dates on which project resources are overallocated? b. How should the resource-loading table be manipulated to correct ...

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In a moving boundary experiment on KC (Am * 26.5 mS/cm) the apparatus consisted of a tube of internal diameter 4.146 mm, and it contained aqueous KCI at a concentration of 0.021 mol dm”. A steady current of 18.2 mA was passed, and the boundary advanced as follows: t/s 200 400 600 800 1000 X/mm 64 128 192 254 318
In a moving boundary experiment on KC (Am * 26.5 mS/cm) the apparatus consisted of a tube of internal diameter 4.146 mm, and it contained aqueous KCI at a concentration of 0.021 mol dm". A steady current of 18.2 mA ...

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El eslabonamiento está sometido a una fuerza de P= 2 KN. Determine el ángulo e necesario para el equilibrio. El resorte no está deformado cuando 0=0°. Ignore la masa de los eslabones.

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