Make an annotated energy flow diagram showing the energy changes that are taking place in a hydroelectric power plant.

A cylindrical solid tube is made out of two smaller tubes, $X$  and $Y$ of different materials. $X$and $Y$ have same length and cross-sectional area. The tube is used to conduct energy from hot to cold reservoir State and explain whether or not the rates of flow of energy through $X and Y$ are same or not?

A cylindrical solid tube is made out of two smaller tubes, $X$  and $Y$ of different materials. $X$and $Y$ have same length and cross-sectional area. The tube is used to conduct energy from hot to cold reservoir State and explain whether or not the temperature differences across $X and Y$ are same or not?