Springs in suspension system of automobiles aremade of steel rods heated and wound into coils while ductile.Consider steel rods (r = 7832 kg/m3, cp = 434 J/kg·K, andk = 63.9 W/m·K) with diameter of 2.5 cm and length of1.27 m. The steel rods are heated in an oven with a uniformconvection heat transfer coefficient of 20 W/m2·K. The steelrods were heated from an initial temperature of 20°C to thedesired temperature of 450°C before being wound into coils.Determine the ambient temperature in the oven, if the steelrods were to be heated to the desired temperature within10 min.

Q: A metallic solid cylinder has a diameter of 11 cm and initial temperature of 300°C. The cylinder is…

A: GIVEN:diameter =11 cminitial temperature =300°Cenvironment temperature =50°C heat transfer…

Q: A plane wall (0.8 m x 0.6 m) at 10 oC is to be heated by attaching 7-cm-long, 3-mm-diameter pin fins…

A: given data-Wall=0.8m×0.6mT0=10°CFin,L=7cm   = 0.07md=3mm  =0.003mk=200 W/mKρ=5000 kg/m2nfin=200…

Q: The inside surface of an insulation layer is maintained at 350oC and the outside surface dissipates…

A: Given that, Temperature at inside surface, Tb=350 °C,Temperature at outside surface, Ts=225 °C,Wall…

Q: The outside wall of a building consists of an inner layer of gypsum plaster, k = 0.17 W/ m K and 1.5…

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Q: A hot surface at 100 °C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminum pin fins…

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Q: Hot water at average temperature of 90°C is flowing through a cast iron pipe (k=40 W/mK) whose inner…

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Q: You are trying to assess the performance of a heat sink with fins. It has straight rectangular…

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Q: Steam flows at a temperature of 550C through a pipe (k-80w / mK) with inner and outer diameters of 5…

A: Given: The temperature of the steam is, T1=550°C. The ambient temperature is, T2=15°C The inner…

Q: You would like to use straight pin fins, with a diameter of 6 mm and length of 4 cm, to cool a…

A: Given, Pin fin dimensions d=6 mm L=4 cm k=205 W/m oC h=25 W/m2 oC No. of fins N=25 Baseplate…

Q: A perfectly insulated aluminium bar (k = 297 W/m K) of diameter 20 cm and length 0.1 m connects a…

A: Thermal conductivity of aluminium bar, k=297 W/m.K Diameter of the bar, d=20 cm = 0.2 m Length of…

Q: A spherical object with a temperature of 700 oC, made of carbon steel with a diameter of 3 cm, will…

A: Given:Tb=700°Cd=3 cmT=370°CT∞=35°Ch=90 W/m2Kk=75 W/mKC=480 J/KgK

Q: The inside surface of an insulation layer is maintained at 350oC and the outside surface dissipates…

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Q: ady-state condition dT K = 30W/m2; T1=85°C %3D dx A(AT)= 30W/ m² ; T1=85°C (AT)= 15W/ m²; T=85°C…

A: GivenA=2m2t=20mmQ=30WT1=85oC

Q: A spherical object with a temperature of 700 oC, made of carbon steel with a diameter of 3 cm, will…

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Q: The inside surface of an insulation layer is maintained at 350oC and the outside surface dissipates…

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Q: One-dimensional steady state heat transfer problem - Consider a 60-mm long aluminum fin W mK (k =…

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Q: ) The wall of a refrigerator is constructed of fiberglass insulation (k =0.035 W/m °C) sandwiched…

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Q: Consider a large uranium plate of thickness 5 cm and thermal conductivity k = 2: W/m. °C, in which…

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Q: A cylindrical fin of Aluminium (k = 200 W/mK) is subjected to a condition where : mL =2.2; h = 200…

A: Introduction Fins…

Q: The exterior wall of a building consists of 120 mm thick face brick (k = 0.9 W/m∙K), 45 mm thick…

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Q: A plane wall (0.8 m x 0.6 m) at 10 oC is to be heated by attaching 7-cm-long, 3-mm-diameter pin fins…

A: Given data as per question Dimension of plate =0.8 m x 0.6 m Length of fin = 7 cm Diameter of fin =…

Q: An experiment was conducted to determine surface convective heat transfer coefficient for peas being…

A: To find:Determine the surface heat transfer coefficient.

Q: A long cylindrical rod of diameter 200 mm with thermal conductivity of 0.5 W/m-K experiences uniform…

A: (a) Write the given data. Radius of cylinder, r1=2002=100 mm=0.1 mThermal conductivity of cylinder,…

Q: 6 cm long copper rod (k = 300 W/mK) 6mm in diameter is exposed to an environment at 20°C. The base…

A: Given:L=6 cm =0.06 mK=300 W/m.Kd=6 mm =0.006 mT∞=20 deg CT=160 deg Ch=20 W/m2.K

Q: Rock has often been suggested as a medium for the thermal storage of energy. A cylindrical piece of…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Consider the base plate of a 1200-W household iron that has a thickness of L = 0.5 cm, base area of…

A: Given: Q = 1200 W L = 0.5 cm A = 300 cm2 k = 15 W/mK

Q: °C) at the outer surface. Find the temperature distribution equation and determine the surface…

A: Given: L=6 m Q= 2 kW d=0.2 cm r=0.1 cm=0.001 m k=1.51 W/moC T∞=30oC h=140 W/m2 To determine: The…

Q: A long 50-cm diameter cylindrical shaft (k = 15 W/m·K, p= 7900 kg/m², C, = 477 J/kg-K) comes out of…

A: Given: The diameter of the cylinder, d = 50 cm = 0.5 m The thermal conductivity of the shaft, k = 15…

Q: A copper rod of thermal conductivity 360 / mK, diameter 10 cm and length 40 cm acts as a stiffener…

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Q: A pin fin of 2024-T6 aluminum has a length and diameter of 8.0 cm and 6.0 mm, respectively. The base…

A: Given Data Diameter =8cm  Length L=6 mm Q=2.50 watt h=30 W/m2K K=120 W/mK

Q: A spherical container of inner radius r₁ = 2 m, outer radius r₂ = 2.1 m, and thermal conductivity k…

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Q: Consider a large plane wall of thickness L = 0.2 m, thermal conductivity k = 1.2 W/mK, and surface…

A: Given: L=0.2 mk=1.2 W/mKA=15 m2heat generation qg=500 W/m3at x=0, T=60oCTa=20oCh=200 W/m2K To find:…

Q: spherical container is made of plastic (k=2 W/mK, ρ=5000 kg/m) and has inner and outer radii of 10…

A: Given DataRi=10cmRo=11cmk=2 W/mKρ=5000 kg/mc=3000 J/kgK ρ=800 kg/m3h=5 W/m2K

Q: N for Newton,  m for meter,  mm for millimeter,  N/(mm^2) for Stress,  mm^2 or m^2 for Area,  mm^4…

A:

Q: Consider a large plane wall of thickness 2L=20mm. Both surfaces of the wall are convectively cooled…

A: we can get a solution by using a space increment of ∆x=2mm. The nodal network will yield 6 unknown…

Q: A 15 cm x 20 cm hot surface at 85°C is to be cooled by attaching 4 cm long aluminum (k = 237 W/m-°C)…

A: The dimension of the hot surface is = 15 x 20 cmThe temperature of hot surface = 85 oCLength of fins…

Q: Q2- A straight fin fabricated from aluminum (k = 237 W/m-K) has a thickness of 3 mm, a breath of 1…

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Q: Consider the composite wall below. The inner side of the wall is subjected to air flow at 430°C with…

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Q: 2. A 15-cm X 20-cm hot surface at 85°C is to be cooled by attaching 4- cm-long aluminum ( k = 237…

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Q: A steel tube, with a thermal conductivity of 50 W /m K, has an inner diameter of 20-mm and outer…

A: Givenk=50W/mKdi=20mmdo=26mmhg=200 W/m2Khw=8000W/m2K

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.