To warm up some milk for a baby, a mother pours milk into a thin-walled glass whose diameter is 6 cm> the height of glass is 7 cm. She then places the glass into a large pan filled with hot water at 70oC. The milk is stirred constantly, so that its temperature is uniform at all times. If the heat transfer coefficient between the water and glass is 120 W/m2K, determine how long it will take to warm up from 3oC to 38oC. Take all the properties of milk to be the same as those of water.

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj