Athick aluminum slab [a-8.4x10 m2/s, and k-200w/m.°c] is initially at a uniform temperature of 20°c suddenly one of its surfaces is raised to 100°c. calculate the time required for the temperature at a depth 5cm from the surface to reach to 80°c

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.