150mm inner diameter from stainless steel (k= 15000 mW/m.K) and the other from copper (k= 398000 mW/m.K). The same amount of water is put into the two coffee pots produced. The coffee pots are placed on the same type of heaters and the heaters are adjusted to the same power (800w) and operated. In this case, does the water in the coffee pots start to boil at the same time or at a different time? Write the Fourier heat conduction equation and explain it on the equation.