A copper plate 2m by 3m and a thickness of 1cm is initially at 20C. It is exposed to a constant heat flux of 500W/m 2 on one side and is exposed to the atmosphere (convective heat transfer coefficient of 20W/m 2 K and ambient temperature of 20C) a) At what temperature will the plate achieve steady state. (5 points) b) Derive an equation for the temperature variation of the plate with respect to time before it achieves steady state. (10 points) You may use actual numbers instead of symbols for known properties. c) Calculate the time to achieve steady state (5 points)