A horizontal copper plate (k= 374 W/m °C, a = uniform in temperature at 250 °C. The bottom surface of the plate is insulated. The top surface is suddenly exposed to a fluid stream at 80 °C. The convection heat transfer coefficient is 935 W/m2 °C. 11.23x10-5 m 2 /s) 10 cm thick is initially | Can the Equation [4-15] be used to solve this problem? h?ar + k2 h Jat x|1- erf X + k T – T; (hx =1- erf X - exp [4-15] Too - T; where X = x/(2/at) T; = initial temperature of solid T = environment temperature If equation CAN NOT be used, state why it cant?

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