A 50cm square vertical plate is maintained at a constantsurface temperature of 1

Question

A 50cm square vertical plate is maintained at a constantsurface temperature of 127C on both sides and placed in a largechamber containing air at 1.7atm and 27C. The walls of thelarge chamber are maintained at 22C and the surface of the verticalplate is blackened on both sides so that its emissivity is1.0. Calculate the total heat lost by both sides of thevertical plate, expressed in watts. OR A semi-infinite solid of stainless steel (18% Cr, 8% Ni) isinitially at a uniform temperature of 0C. The surface ispulsed with a laser with 10MJ/m^2 instantaneous energy. Calculate the temperature at the surface and depth of 1cm after atime of 3s. What strength pulse would be neccessary toproduce the same temperature effect at a depth of 1.2cm as thatexperienced at a depth of 1.0cm? A 50cm square vertical plate is maintained at a constantsurface temperature of 127C on both sides and placed in a largechamber containing air at 1.7atm and 27C. The walls of thelarge chamber are maintained at 22C and the surface of the verticalplate is blackened on both sides so that its emissivity is1.0. Calculate the total heat lost by both sides of thevertical plate, expressed in watts. OR A semi-infinite solid of stainless steel (18% Cr, 8% Ni) isinitially at a uniform temperature of 0C. The surface ispulsed with a laser with 10MJ/m^2 instantaneous energy. Calculate the temperature at the surface and depth of 1cm after atime of 3s. What strength pulse would be neccessary toproduce the same temperature effect at a depth of 1.2cm as thatexperienced at a depth of 1.0cm?

Explanation / Answer

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