How much heat is conducted in one hour through an iron plate 2.0 cm thick and 100 cm2 in area, the temperature of the two sides being kept at 0 and 20°C?
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How much heat is conducted in one hour through an iron plate 2.0 cm thick and 100 cm2 in area, the temperature of the two sides being kept at 0 and 20°C?
COMPLETE FBD SOLUTION AND REQUIREMENTS
PS. THIS IS A HEAT TRANSFER PROBLEM
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- 3. (a) The rate of heat transfer through a wood shingles roof of 4.50 m length, 3.90 m width and in 8.50 cm thickness is 126.65 W. The temperature of outside and inside-surface is 33.5 °C and 26.5 °C, respectively. (i) Determine thermal resistance, R of the wood shingles roof. (ii) Calculate the thermal conductivity. Give your answer in 3 decimal places. (iii) If a glass wool with higher thermal resistance is used to replace the wood shingles roof, determine which material tend to have lesser rate of heat transfer.temperature is 330 K. Find the heat loss per unit area and the temperature of the junction of the fire brick and insulating brick? RO 5. In Sohar Petroleum Company, a steam pipeline, with 150 mm ID and 160 mm OD carries steam. The pipeline is surrounded with a layer of heat insulating material (K=0.08 W/m.k) of thickness 100 mm. The temperature drops from 392.8 K to 313 K across the insulating surface. Determine the rate of heat loss per 1 m length of pipe line. ID = 1Somm 160 mm OD,h-loo mm .K=0.08w/m.k %3D 「-392.8 ん/ 12 = 313k = 313 K 2.Older railroad tracks in the U.S. are made of Part A 12-m-long pieces of steel. When the tracks are laid, gaps are left between the sections to prevent buckling when the steel thermally expands. If a track is laid at 16° C, how large should the gaps be if the track is not to buckle when the temperature is as high as 50° C? The coefficient of linear expansion of soft steel is 1.1 × 10-5 °C-1. Express your answer with the appropriate units. HẢ .... Value %3D Submit Previous Answers Request Answer
- A homeowner is unhappy with her heating costs. One wall of her house is 4 meters tall and 8 meters wide and has no windows, and it is made of brick and mortar with a thermal conductivity of 1.0 W m K . It is 40 cm thick. The house is heated to a temperature of 20 ◦C inside. (a) What is the rate of heat loss through the wall on a day when it is 0◦C outside? (b) A layer of rock mineral wool, which has a thermal conductivity of 0.032 W m K is to be installed on the interior surface of the brick wall. How thick should the layer be to lower the rate of heat transfer through this wall to half its original value? (c) If the rock mineral wool is instead installed on the outer surface, is the thickness required the same?Ice has formed on a shallow pond, and a steady state has been reached, with the air above the ice at -7.6°C and the bottom of the pond at 3.7°C. If the total depth of ice + water is 2.3 m, how thick is the ice? (Assume that the thermal conductivities of ice and water are 0.40 and 0.12 cal/m-Cº-s, respectively.) Number UnitsA Styrofoam ice box has a total area of 0.950 m^2 and walls with an average thickness of 2.50 cm. The box contains ice, water, and canned beverages at 0 oC . The inside of the box is kept cold by melting ice. What is total amount of heat required to melt ice in one day if the ice box is kept in the trunk of a car at 35.0oC ?