Things to be done before isolation
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If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

Cold water (cp=4180j/kg k) leadıng to a shower enters a thin-walled double-pipe heat transfer at 15c at a rate of 0.25kg/s and is heated to 45c by hot water (cp=4190j/kg k) that enters at 100c at the rate of 3kg/s. if the overall heat transfer coefficient is 950w /m2 k , determıne the rate of heat transfer and the heat transfer surface area of the heat exchanger using e - ntu method

Air flows over a flat plate at a velocity of 3 m/sec and ambient conditions are, the pressure is 761 mm of hg and tempera- ture is 15°c. the plate is maintained at 85°c. if the length of the plate is 100 cm along the flow of the air, find out the heat lost by 50 cm of the plate which is measured from the trailing edge. plate width is 50 cm.