Question :A circular furnace has 2 end diffuse, gray surfaces. Both surfaces (surfaces 1 &2) are kept at 500 K and each surface has an emissivity of 0.5. The diameter and the length of the furnace are 0.5meters. Its lateral surface (surface 3) is also diffuse and gray and kept at 1000 K (surface 3 has an emissivity of 0.8). Answer the following questions: Part (A) What is the view factor F₁2 ? Part(B) Draw the radiation network

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I need these three parts answered (Multiple Choice). If you can not answer all three parts please leave it for another tutor to answer. Thank you.   For the two holes identified as datum D, what is the total size tolerance specified for those holes? (Multiple Choice)a. .002'b. .003'c. .004'd. .006' The two holes identified as datum D have a counterbore on one end. What size toleranceis specified for the counterbore diameter? (Multiple Choice)a. .010″ (±.005″; see title block)b. .020″ (±.010″; see title block)c. .030″ (±.015″; see title block) What letter represents the revision status of this print? (Multiple Choice)ABCD