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

A:

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

A:

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: A liquid food is being pumped in a 1 cm thick steel pipe. The inside diameter of the pipe is 5 cm.…

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

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: 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: 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: A 2-meter long prism with square cross-section of side 0.1m is made of stainless steel with a…

A: The length of the prism is l=2m. The cross-section is a square of the side a=0.1 m. The thermal…

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.