Asmall oxidized horizontal metal tube with an od of 0.0254 m and 0.61 m long with a surface temperature at 588 k is in a very large furnace enclosure with firebrick walls and the surroundings air at 1088 k. the emissivity of the tube is 0.60 at 1088 k and 0.46 at 588 k. calculate the heat transfer rate to the tube by radiation.

Which of the following compounds would be expected to have the strongest ionic bonds? a)the compound that has b)the largest ions with the greatest charge c)the compound that has d)the largest ions with the least charge the compound that has the smallest ions with the greatest charge the compound that has the smallest ions with the least charge