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Question 1(a) / Soalan 1(a)
Power / rate of radiation given by H = esAT-4 Where ; H = Power / rate of radiation - given indirectly by the power of the lamp e = emissivity of surface - 40% of black body. Black body is considered as 100% radiative. (e=1) . s = Stefan Boltzman constant. Given in the question . A = surface area - can be calculated from the given diagran T = Temperature .- This is what you have to calculated. SUIbstitude all the known valeus, you will get the answer. Question 2 |