A silicon chip measurihg 5 mm on a side and 1 mm in thickness is embedded in a ceramic substrate. At steady state,the chip has an electrical power input of 0.225 w. The top surface of the chip is exposed to a coolant whose temperature is 20 .the heat transfer coefficient for convection between the chip amd the coolant is 150 w/m .K . If heat transfer by conduction between the chip and the substrate is negligible,determine the surface temperature of the chip,in