MetalAluminumsPure99% pureDuralumin(4% Cu, 0.5% Mg)Alloy 6061-T6Alloy 7075-T6ChromiumCupreous metalsPure CopperDS-C15715*Beryllium copper(2.2% Be)Brass (30% Zn)Bronze (25% Sn)Constantan(40% Ni)German silver(15% Ni, 22% Zn)GoldFerrous metalsPure ironCast iron (4% C)Steels (Cs 1.5%)||AISI 1010¹t0.5% carbon.1.0 % carbon1.5% carbon.Properties at 20°CkPCp(kg/m³) (J/kg-K) (W/m-K) (10-5 m²/s) -170°C -100°C2,7072,7872,7002,8007,1908,9548,9008,2508,61819,3209057,8977,2728838,522 3858,6663438,9224108968414533843844203941294474207,8304347,8334657,8014737,753 4862372111641671309039836510310926222531880526454Table A.1 Properties of metallic solids.4336(X9.616.666.905.522.7711.5710.72.973.320.860.610.7312.762.261.701.881.471.170.97302220k and a for carbon steels can vary greatly, owing to trace elements.tt 0.1% C, 0.42% Mn, 0.28% Si; hot-rolled.7615848373171832713224220612610012042089191932498700°C 100°C 200°C 300°C 400°C236209164166121954013671062224319846555Thermal Conductivity, k (W/m.K)4336* Dispersion-strengthened copper (0.3% Al2O3 by weight); strength comparable to stainless steel.$ Conductivity data for this and other bronzes vary by a factor of about two.2401821721378839135511713326313137261524336238 23419417717285389345143354030663554842361801778238433514645299565045403522877378320147482935045423633600°C215693662793936353331800°C 1000°C95 (liq.)64 62352 336264 249302931292829.5292828 As an intern on the shop floor of your engineering firm, you are asked to come up with amakeshift door handle for a furnace. When the furnace is in operation, the external surfaceof the door is approximately 160°C. You search the scrap metal bin and find some sort ofcarbon steel rod that you believe you can bend into a U-shape and weld to the outer doorsurface. The rod is 50 cm long with a 6 mm diameter. There is negligible contact resistancethrough the weld joint and surrounding air at 24°C will cool the handle (h = 15 W/m² · K).a) You know that attaching a metal rod to a hot object might cause someone to getburned, so in analyzing your handle you want to be as cautious as possible. Sinceyou don't know what kind of carbon steel you have found, you will have to estimateits relevant properties. Choose properties of the carbon steel from Table A.1 thatwill ultimately predict the largest handle temperatures during analysis.b) What is the coolest temperature of the handle?c) How close to the door can you grasp the handle without getting burned if Tüurn65°C?

Answered: Image /qna-images/answer/f6c104f0-3204-43b8-b836-d8389fc65a54.jpg

As an intern on the shop floor of your engineering firm, you are asked to come up with a makeshift door handle for a furnace. When the furnace is in operation, the external surface of the door is approximately 160°C. You search the scrap metal bin and find some sort of carbon steel rod that you believe you can bend into a U-shape and weld to the outer door surface. The rod is 50 cm long with a 6 mm diameter. There is negligible contact resistance through the weld joint and surrounding air at 24°C will cool the handle (h = 15 W/m².K). a) You know that attaching a metal rod to a hot object might cause someone to get burned, so in analyzing your handle you want to be as cautious as possible. Since you don't know what kind of carbon steel you have found, you will have to estimate its relevant properties. Choose properties of the carbon steel from Table A.1 that will ultimately predict the largest handle temperatures during analysis. b) What is the coolest temperature of the handle? c) How close to the door can you grasp the handle without getting burned if Tburn = 65°C?

As an intern on the shop floor of your engineering firm, you are asked to come up with a makeshift door handle for a furnace. When the furnace is in operation, the external surface of the door is approximately 160°C. You search the scrap metal bin and find some sort of carbon steel rod that you believe you can bend into a U-shape and weld to the outer door surface. The rod is 50 cm long with a 6 mm diameter. There is negligible contact resistance through the weld joint and surrounding air at 24°C will cool the handle (h = 15 W/m².K). a) You know that attaching a metal rod to a hot object might cause someone to get burned, so in analyzing your handle you want to be as cautious as possible. Since you don't know what kind of carbon steel you have found, you will have to estimate its relevant properties. Choose properties of the carbon steel from Table A.1 that will ultimately predict the largest handle temperatures during analysis. b) What is the coolest temperature of the handle? c) How close to the door can you grasp the handle without getting burned if Tburn = 65°C?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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