8 cm long flat copper plate is a part of a structure undergoing tests in a high speed wind tunnel. The test conditions are an air velocity of 1025m/s...

8 cm long flat copper plate is  a part of a structure undergoing tests in a high speed wind tunnel. The test conditions are an air velocity of 1025m/s a pressure of 50 kpa and a temperature of 280K. Determine the equilibrium temperature of the plate if its surface emittance is 0.26 and the tunnel walls are at 355K.