Two aligned parallel rectangles with dimensions 6 m × 8 m are Spaced apart by a distance o...

Two aligned parallel rectangles with dimensions 6 m × 8 m are Spaced apart by a distance of 2 m. If the two parallel rectangles are experiencing radiation heat transfer as black surfaces, determine the percentage of change in radiation heat transfer rate when the rectangles are moved 8 m apart. Answers: 71.6 percent