Consider a composite wall consisting of two layers (A and B). Both layers have the same thickness of LA=LB=1 m and the identical thermal conductivity kA=kB=1 W/m-K. Layer Bhas a uniform volumetric heat generation rate q=1 W/m^3. The left surface of the composite wall is subject to convection with a convectional heat transfer coefficient h = 1 W/m^2-K and an ambient temperature T[infinity]= 1 K, while there is a surface heat flux of 1W/m2that flows to the left. You may assume 1-D heat transfer, steady state condition, and neglect any thermal contact resistance. Required:
Sketch the temperature profile in layer A and B below.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit. explain why the pneumatic piston stumbles when it hits an obstacle.