A 2.2-mm-diameter and 10-m-long electric wire istightly wrapped with a 1-mm-thick plastic cover whose thermalconductivity is K = 0.15 W/m·K. Electrical measurementsindicate that a current of 13 A passes through the wire and there is a voltage drop of 8 V along the wire. If the insulatedwire is exposed to a medium at T` = 30°C with a heat transfercoefficient of h = 24 W/m2·K, determine the temperature at theinterface of the wire and the plastic cover in steady operation.Also determine if doubling the thickness of the plastic coverwill increase or decrease this interface temperature.

Q: A 2m diameter disk made of brick fire 30cm thick is in contact with a 3m x 2m insulating brick wall…

A: Given data: Diameter of disc, d = 2 m Length of wall, l = 3 m Breadth of wall, b = 2 m Thickness of…

Q: The window of a room is made of 5 mm thick glass which has a thermal conductivity of 1.4 W/m-K. A…

A: Given:Thickness of glass window = L = 5 mm = 0.005 mThermal conductivity of glass = k = 1.4…

Q: Under steady-state conditions, the wall of a brick house is measured to have an inside temperature…

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Q: Determine the heat flux for a furnace wall made of fire clay if the furnace wall thickness is 6’’…

A: Given Data⇒ Wall thickness∆t=6'' Since we know that : 1 inch=0.0254 m ∆t=6×0.0254∆t=0.1524 m Thermal…

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Q: A long, 150-mm-diameter cylindrical metal (k = 20 W/m-K, p = 7900 kg/m³, cp = 650 J/kg-K) billet is…

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Q: A 2.5-cm-thick sheet of plastic initially at 20oC is placed between two heated steel plates that are…

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Q: determine the rate of heat transfer through the wall in Watts and the temperature at the inner and…

A: Here is the solution in determining the rate of heat transfer through the wall and the temperatures…

Q: A soil with thermal diffusivity 6X106 m2/s and thermal conductivity 30 w/m.K is initially at a…

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Q: W concrete on the outside is 8.00cm thick and has a thermal conductivity of 0.500- m.K W wood on the…

A: givenoutside temp= 7.00°cinside temp=22.00°csurface area of wall= 20.0m3

Q: A flat wall 0.1 m thick and k = 25 W/(m-°C) has a heat generation rate per unit ofvolume of 0.3…

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Q: Electric current flows through a 10 mm diameter conducting rod, 1 m long. A rod with a surface…

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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: 10 hot rods (L = 5 m and d = 2 cm) are buried in the ground parallel to each other each rod is 10 cm…

A: The given information in the problem is shown in the following attached image:

Q: Hot gases at 278 ºC flow on one side of a metal plate of 10 mm thickness and air at 48 ºC flows on…

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Q: A stainless steel alloy has cylindrical shape (k = 25 W/m.oC), diameter is 10 cm and 25 cm long,…

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Q: ansfer coeffic ndings is 5 e heat loss

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Q: Calculate the thermal conductivity (in W/m-K) of a material having a heat loss of 1028 watts, inside…

A: Given: The heat loss is Q=1028 W. The inside diameter is d1=59.4 cm. The thickness is t=118.4 mm.…

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: Example 1 A 15 mm diameter and 5 m long electric wire is tightly wrapped with 2 mm thick plastic…

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Q: The temperature on the left surface of the wall is measured as T1 = 60 C under continuous conditions…

A: Write the expression for the heat flux through the wall.

Q: Determine the temperature at the base of the shaft (where it connects to the motor. A shaft from a…

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Q: A 5 cm long rectangular fin with a cross-section of 2 mmx5 mm is being used on a heated surface.…

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Q: A 3 mm diameter and 5 mm long electric wire is tightly wrapped with a 2 mm thick plastic cover of…

A: When heat flows radially outwards in case of cylindrical body then there exists a temperature…

Q: A spherical container of negligible thickness holding a hot fluid at 140 oC and having an outer…

A: GivenTh=140oCdo=0.4mt1=50mm=0.05mk1=0.02 W/m Cok2=0.06 W/m Cok3=0.16 W/m CoTc=30oC

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: A. The Heat Flow B. Conductive resistance

A: (a) Heat flow = Q=T1-T2L/(kA) T1-T2=∆T= Temperature difference L = thickness of the wall k = thermal…

Q: Calculate the heat transfer rate from a single-pane glass window with aninside surface temperature…

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Q: Two large stainless steel plates at temperatures of 90°C and 70°C are separated by a stainless steel…

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Q: Question 4 The window of a room is made of 5 mm thick glass which has a thermal conductivity of 1.4…

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Q: a 1 m-wide by 2 m-high window is composed of two 5 mm-thick glass panes, seperated by an air space…

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Q: A cylindrical nuclear fuel rod generates heat at a rate of 71 MW3. It is cooled by fluid at 417 K…

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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.