Assuming that the blocks are not filled, compute the unit thermal resistance for the partition of Problem 5-4.
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- The central bar CD of the assembly is heated from 30 ° C to 180 ° C by means of an electrical resistance. Also the two bars AB and EF are heated from 30 ° C to 50 ° C. At the lower temperature of 30 ° C, the space between C and the rigid bar is 0.7 mm. Determine the force in bars AB and EF caused by the increase in temperature. Bars AB and EF are made of steel and each has a cross-sectional area of 125 mm ^ 2; CD is aluminum with a cross-sectional area of 375 mm ^ 2. Steel = 200GP; Ealuminum = 70 GPa; alpha steel = 12 X10 ^ -6 (1 / ºC); alpha aluminum = 23 X10 ^ -6 (1 / ° C).The device is used to measure a change in temperature. Bars AB and CD are made of A-36 steel and 2014-T6 aluminum alloy, respectively. When the temperature is at 75°F, ACE is in the horizontal position. Determine thevertical displacement of the pointer at E when the temperature rises to 150°F.Determine the effiency of the fin ?
- How would I draw this free body diagram? I'm not entirely sure what is happening at A, is it a fixed wall support with rollers? So it would have Ax, Ay and Ma components? I am also unsure how to identify the equilibirum equations.In addition , the space between the upper cap, the lower cap, and the cylindrical wall is filled with linear insulating material of permeability u.For the given values, determine the efficiency of the fin?
- A structural membrane contains surface flaws of initial depth of 0.015 inchesDetermine the life of the membrane in cycles if it is repeatedly loaded from 0 to 60 ksi. Assume K1=95 ksi-in¹/2, n=3 and C=4x10-10 (Ksi²cycle)^-1The cylinder CD of the assembly is heated from T1 = 30°C to T2 = 180°C using electrical resistance. Also, the two end rods AB and EF are heated from T1 = 30°C to T2 = 50°C. At the lower temperature T1 the gap between C and the rigid bar is 0.7 mm. Determine the force in rods AB and EF caused by the increase in temperature. Rods AB and EF are made of steel, and each has a cross-sectional area of 125 mm2. CD is made of aluminum and has a cross-sectional area of 375 mm2. Est = 200 GPa, Eal = 70 GPa, ast = 12(10-6)>°C, and aal = 23(10-6)>°C.The heat conducts through the shape below. The temperature of the right face is 93 °C, while the left faceis at 23 °C. If the top and bottom faces are completely insulated, and the thermal conductivity of thematerial decreases with decreasing temperature, sketch the temperature profile inside the plate.
- 2.50 Compare the rate of heat flow from the bottom to the top of the aluminum structure shown in the sketch below with the rate of heat flow through a solid slab. The top is at v, the bottom at . The holes are filled with insulation that does not conduct heat appreciably.Two solid blocks resting on a smooth plane are connected by a string as shown in Figure 13-39. Determine the maximum force P that can be applied to the 8 block if the maximum strength oof the string is 0.5 lb. Consider the blocks as particles. Answer= 2.35 lbThe compartment below is used as a freezer of refrigerator compartment. Inner wall is at -10 C and outer wall is at 20 C. Insulator with a thermal conductivity of 0.040 W/(mK) is used to prevent the heat losses from the compartment. The shape is in square form with a side of 1.3 m and unit width into the page. Determine the amount of the heat load if the thickness of the insulator is 2 cm? *