URGENT: Heat transfer - temperature gradient value at a certain point 1. The problem statement, all variables and given/known data Given a very long cylinder of inner R1 = 0,01 m, outer radius R2 = 0,1 m, that transports water at 150ºC, and surrounded by air at 25ºC, find the temperature gradient value at R = 0,07m. [tex]\lambda[/tex] = 500 kcal/mhºC 3. The attempt at a solution My question is more theorical than anything. I'm assuming estationary regime, and that the temperatures of the water and the air are uniform. Then, shouldn't the temperature gradient value be the same at any point? How am I supposed to calculate it for a certain point? I know that for a cylinder, the heat transfer Q = -[tex]\lambda[/tex]*grad(T) = -[tex]\lambda[/tex]*2[tex]\pi[/tex]*R*L*(Tinside - T1)/(ln (R/R1)). But I just don't see it. Thanks.