A steel billet of 0.2m 0.2m 0.4m lies on its 2m 0.4m face on the floor of a furnace and is exposed to radiation on all the other faces from a source at 1500c. The density of the material is 7830 kg/m3 and the specific heat is 960 j/kgk. Determine the rate of rise in the average temperature of the billet when its surface temperature is 500c. Will the heating rate increase or decrease with rise in temperature of the surface?
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its so hard i cant answer it
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