Question: The temperature at the point ( x , y , z ) in a substance with conductivity K = 5 . 5 is u (

The temperature at the point (x,y,z) in a substance with conductivity K=5.5 is u(x,y,z)=3y2+3z2. Find the rate of heat flow inward across the cylindrical surface y2+z2=7,0x5.
The temperature at the point ( x , y , z ) in a

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