Consider a rectangular rod composed of 3 metals – copper, platinum, and gold. each metal makes up 1/3 of the total length of the bar. one end of the bar is maintained at a hot temperature, while the other is held at a cooler temperature, starting from the hot end, what order do you assemble the metals to achieve the lowest temperature at the midpoint of the bar? what does the piecewise temperature profile look like? plot it using matlab or spreadsheet software. (you will need to look up material properties. assume constant properties. assume the bar is well insulated such that it is isothermal in the cross-section).

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.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false