To determine the thermal conductivity of a long, solid 2.5-cm-diameter rod, one half of the rod was inserted into a furnace while the other half was projecting into air at 27°C. After steady state had been reached, the temperatures at two points 7.6 cm apart were measured and found to be 126°C and 91°C, respectively. The heat transfer coefficient over the surface of the rod exposed to the air was estimated to be 22.7 W/m²K. What is thermal conductivity of the rod?

Q: For heat transfer purposes, an egg can be considered to be a 4-cm diameter sphere having the…

A: Given : The diameter of the egg is The boiling temperature of water is The heat transfer…

Q: The wall of a furnace has a thickness of 5 cm and thermal conductivity of 0.7 W/m-°C. The inside…

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

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Q: Consider a long, pure iron rod with a diameter of 2 cm and at an initial uniform temperature of 27…

A: To determine the temperature at the centre of a long iron rod after 45 seconds of heating, we use…

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

A: Giventhe thermal diffusivity the thermal conductivity of the plasticthickness of the sheet…

Q: We are testing a thin, transparent film heater that is bonded to the inside of an automobile window…

A: Thickness of atuomobile window, t=3 mmSurface area of window, A=0.6 m2Air temperature inside the…

Q: A steel plate having a thickness of 100 mm is suddenly exposed to a hot gas at 1000 oC in a furnace.…

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Q: In an experiment to determine the thermal conductivity of a new metal alloy, a bar of the metal is…

A: GivenQ=705Wr=0.069mL=0.365mTh=67.3oCTc=10.5oC

Q: The top of a large industrial hot water heater has been left uninsulated. The top may be modeled as…

A: To calculate the heat transfer rate from the top of the hot water heater, we need to consider both…

Q: In an orbiting space station, an electronic package is housed in a compartment having a surface area…

A: Surface area, A=1 m2 Surface emissivity, ε=1 Space temperature, To=0 K Heat generated, Q=500 W Solar…

Q: The wall of a furnace consists of 200 mm thick refractory brick (k = 3 Btu / hr-ft2-0F), 100 mm…

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Q: A long 20 cm diameter shaft made of stainless steel 304 comes out of an oven at a uniform…

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Q: The ears of a rabbit can be thought of as two rectangular fins that dissipate heat. The dimensions…

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Q: A 4-mm and 2-m-long electric wire is tightly wrapped with a 2-mm-thick plastic cover whose thermal…

A: Write the given value using suitable variables. Here r1 signifies wire radius, L signifies wire…

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

A: The diameter of the pipe is d=2.5 cm. The length of the pipe is L=0.3 m The thermal conductivity of…

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.