A long iron rod (r = 7870 kg/m3, cp = 447 J/kg·K,k = 80.2 W/m·K, and a = 23.1 * 10–6 m2/s) with diameter of25 mm is initially heated to a uniform temperature of 700°C.The iron rod is then quenched in a large water bath that is maintained at constant temperature of 50°C and convection heat transfer coefficient of 128 W/m2·K. Determine the time required for the iron rod surface temperature to cool to 200°C. Solve this problem using analytical one-term approximation method (not the Heisler charts).

Q: A copper bar of thermal conductivity 401 W/(m·K) has one end at 114°C and the other end at 24.0°C.…

A:

Q: A copper rod is 0.705 m long with a rectangular cross section of dimensions 0.0555 m by 0.0755 m.…

A:

Q: A one-shell and two-tube type heat exchanger has an overall heat transfer coefficient of 300…

A: The capacity ratio is The number of transfer units is

Q: The thermal conductivities of human tissues vary greatly. Fat and skin have conductivities of about…

A:

Q: The world's most active volcanoes, such as the Kilauea volcano in Hawaii, can disgorge about 5 ✕ 105…

A: Given: The volume of the lava is 5×105 m3. The initial temperature of the lava is 1025 °C. The final…

Q: A concrete slab is 10.0 cm thick and has an area of 4.50 m². Electric heating coils are installed…

A: Given data: Thickness of the slab, L=10 cm=10×10-2 m=0.1 m Area of the slab, A=4.50 m2 Temperature…

Q: A copper block with a mass of 600 grams is cooled to 77 K by being immersed in liquid nitrogen. The…

A:

Q: The 0.75 cm thick windows of a house have a total surface area of 9.0 m². The thermal conductivity…

A:

Q: A solid sphere of radius R= 8.0 cm uniformly generates 5 x 10 W/m' of heat within it. Surrounding…

A: please see the next step for solution

Q: The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are…

A: In the question we have given the thickness of the layers are L2 =0.650L1 and L3 = 0.25L1 K2 =0.8K1…

Q: An energy technician is investigating energy loss through windows. The windowpane of interest is…

A: Given: Thermal conductivity of windowpane = 0.8 W/(m · °C) Thickness of windowpane = 0.5 cm = 0.005…

Q: e rate of heat flow

A:

Q: Consider a metal rod with the original length L=2.0m and cross-sectional area A=0.01m². The linear…

A:

Q: A cabin has a 0.159-m thick wooden floor [k = 0.141 W/(m. C°)] with an area of 13.4 m². A roaring…

A:

Q: A concrete slab (thermal expansion coefficient of 1.20 x 10-5 per degree Celsius) is laid down with…

A: Given:Initial length, Lo = 18.9 mInitial temperature, To = 14o Ccoefficient of thermal expansion, α…

Q: Suppose you stand with one foot on ceramic flooring and one foot on a wool carpet, making contact…

A: Step 1:Step 2:

Q: Steam at 160 ° C flows in a pipe having an inner radius of 50 mm and an outer radius of 55 mm. The…

A: Given: The temperature of the steam is 160∘C. The inner radius of the pipe is 50 mm. The outer…

Q: A large steam pipe is covered with a 4.80 cm thick insulating material with a thermal conductivity…

A:

Q: A sealed container isolated from its environment holds 0.770-kg of water at 13.5°C.  A heater inside…

A:

Q: A concrete slab (thermal expansion coefficient of 1.20 x 10-5 per degree Celsius) is laid down with…

A: Given Data: The thermal expansion coefficient is, α=1.20×10-5/°C The length of a slab is, L=21.5 m…

Q: A heat-conducting rod, 1.60 m long and wrapped in insulation, is made of an aluminum section that is…

A: Given data: The length of aluminum rod is LA=0.90 m The length of the copper rod is LC=0.70 m The…

Q: The outside surface temperature of the door to a large industrial oven is measured to be 127.0°C.…

A: Step 1:Step 2:Step 3: Step 4:

Q: At a temperature of 20.20°C the hole in a steel plate has a diameter of 1.045 cm. If a steel rod…

A: The initial temperature of the steel plate is,The coefficient of area expansion of the steel plate…

Q: Consider two cylindrical rods that are identical in size and shape, but are made of different…

A: Given that:k1=205 W/mKk2=109 W/mKA1=A1=A=0.0004 m2d=0.4000 m∆T=100 KTo determine the heat current in…

Q: A copper bar of thermal conductivity 401 W/(m·K) has one end at 114°C and the other end at 24.0°C.…

A:

Q: A pure aluminum plate is part of a heat shield for a manufacturing process. The aluminum plate has a…

A: Step 1:Step 2: Step 3: Step 4:

Q: A sealed container holding 0.492 kg of liquid nitrogen at its boiling point of 77.3 K is placed in a…

A: Heat energy is how quickly the molecules and particles in a substance are moving. Temperature is the…

Q: A concrete slab (thermal expansion coefficient of 1.20 x 10-5 per degree Celsius) is laid down with…

A:

Q: Suppose you stand with one foot on ceramic flooring and one foot on a wool carpet, making contact…

A: Step 1: Step 2:

Q: At 20∘C, the hole in an aluminum ring is 2.400 cm in diameter. You need to slip this ring over a…

A: Given: αAL=23×10-6K-1, αS=12×10-6K-1, LAL=2.4 cm, LS=2.406cm Using the concept of linear expansion,…

Q: A liquid food (density = 1,010 kg/m3, k =.5W/m°C, Cp = 3,000J/kg°C) is being heatedfrom an initial…

A: (a) The Biot number is a dimensionless quantity, which is used in the calculations of the heat…

Q: An electric stove burner has surface area 325 cm² and emissivity e = 1. The burner consumes 1500 W…

A: We are aware that an electric stove burner has a surface area of 325 cm2, an emissivity of 1,…

Q: Thank u! A copper rod has one end in ice at a temperature of O°C, the other in boiling water. The…

A: The heat conductivity of copper is about three times higher than that of brass. That means the…