
The 150-mm-thick wall of a gas-fired furnace is constructed of fireclay brick
(a) How long does it take for the outer surface of the wall to reach a temperature of 750°C’?
(b) Plot the temperature distribution in the va1l at the foregoing lime, as well as at several intermediate times.

Want to see the full answer?
Check out a sample textbook solution
Chapter 3 Solutions
Introduction to Heat Transfer
- Determine Cartesian vector expressions for reaction forces at A and B i.e. determine FA and FB.arrow_forwardFind the Laplace Transform of the following functions 1) f() cos(ar) Ans. F(s)=7 2ws 2) f() sin(at) Ans. F(s)= s² + a² 3) f(r)-rcosh(at) Ans. F(s)= 2as 4)(t)=sin(at) Ans. F(s)= 2 5) f(1) = 2te' Ans. F(s)= (S-1) 5+2 6) (1) e cos() Ans. F(s) = (+2)+1 7) (1) (Acostẞr)+ Bsin(Br)) Ans. F(s)- A(s+a)+BB (s+a)+B 8) f()-(-)() Ans. F(s)= 9)(1)(1) Ans. F(s): 10) f(r),()sin() Ans. F(s): 11) 2 k 12) 0 13) 0 70 ㄷ.. a 2a 3a 4a 2 3 4 14) f(1)=1, 0<1<2 15) (1) Ksin(t) 0arrow_forwardFor Problems 5–19 through 5–28, design a crank-rocker mechanism with a time ratio of Q, throw angle of (Δθ4)max, and time per cycle of t. Use either the graphical or analytical method. Specify the link lengths L1, L2, L3, L4, and the crank speed. Q = 1; (Δθ4)max = 78°; t = 1.2s.arrow_forward3) find the required fillet welds size if the allowable shear stress is 9.4 kN/m² for the figure below. Calls Ans: h=5.64 mm T = حاجة ، منطقة نصف القوة 250 190mm 450 mm F= 30 KN そのに青 -F₂= 10 KN F2arrow_forwarda problem existed at the stocking stations of a mini-load AS/RS (automated storage and retrieval system) of a leading electronics manufacturer (Fig.1). At these stations, operators fill the bin delivered by the crane with material arriving in a tote over a roller conveyor. The conveyor was designed at such a height that it was impossible to reach the hooks comfortably even with the tote extended. Furthermore, cost consideration came into the picture and the conveyor height was not reduced. Instead, a step stool was considered to enable the stocker to reach the moving hooks comfortably. The height of the hooks from the floor is 280.2 cm (AD). The tote length is 54.9 cm. The projection of tote length and arm reach, CB = 66.1 cm. a) What anthropometric design principles would you follow to respectively calculate height, length, and width of the step to make it usable to a large number of people? b) What is the minimum height (EF) of the step with no shoe allowance? c) What is the minimum…arrow_forwardQu. 5 Composite materials are becoming more widely used in aircraft industry due to their high strength, low weight and excellent corrosion resistant properties. As an engineer who is given task to design the I beam section of an aircraft (see Figure 7) please, answer the following questions given the material properties in Table 3. Determine the Moduli of Elasticity of Carbon/Epoxy, Aramid/Epoxy, and Boron /Epoxy composites in the longitudinal direction, given that the composites consist of 25 vol% epoxy and 75 vol% fiber. What are the specific moduli of each of these composites? What are the specific strengths (i.e. specific UTS) of each of these composites? What is the final cost of each of these composites?please show all work step by step problems make sure to see formula material sciencearrow_forwardMueh Battery operated train Coll 160,000kg 0.0005 0.15 5m² 1.2kg/m³ CD Af Pair 19 пре neng 0.98 0.9 0.88 Tesla Prated Tesla Trated "wheel ng Joxle 270 kW 440NM 0,45m 20 8.5kg m2 the middle Consider a drive cycle of a 500km trip with 3 stops in Other than the acceleration and deceleration associated with the three stops, the tran maintains constat cruise speed velocity of 324 km/hr. The tran will fast charge at each stop for 15 min at a rate Peharge = 350 kW ΟΙ 15MIN Stop w charging (350kW) (ผม τ (AN GMIJ t 6M 1) HOW MUCH DISTANCE dace is covered DURING THE ACCELERATION TO 324 km/hr? 2) DETERMINE HOW LONG (IN seconds) the tran will BE TRAVELING AT FULL SPEED 2 ? 3) CALCULATE THE NET ENERGY GAW PER STOP etearrow_forwardPlease stop screenshoting ai solution,it always in accurate solve normalarrow_forwardResearch and select any different values for the Ratio of connecting rod length to crank radius from various engine models, then analyze how these changes affect instantaneous velocity and acceleration, presenting your findings visually using graphs.arrow_forwardPb 9) 4.44 bas gnibus& WX 002 grillimatul fred bail (e) For the simply supported I-beam, a load of 1000 lb in center. Find the maximum transverse shear stress. Compare your answer with the approximation obtained by dividing the shear load by the area of the web only with the web considered to extend for the full 8-in depth. - 3½ in. 12 bas in 0% to tolerabib tormi no grived in. 8 in. 38 in. 12 ½ in.arrow_forwardPb 12) 4.61 Draw the Mohr circle for the stresses experienced by the surface of an internally pressurized steel tube that is subject to the tangential and axial stresses in the outer surface of 45 ksi and 30 ksi, respectively, and a torsional stress of 18 ksi. yx 18 45 30arrow_forwardPb 8) 4.39 For the C-clamp shown, what force F can be exerted by the screw if the maximum tensile stress in the clamp is to be limited to 30 ksi? F 2 in. სის 3436 16 13 blos 0101 alos12 nodus 121A (s 3 in. in. 16 in. 16 web leonas OFF elson yollA (d 016 (& d of bolow-bloo ai 15912 020112LA sue) vilisub 22 bal.90 Swman a bris ctxibasqqA) laste is tools?arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage LearningPrinciples of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning

