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Water flows through a 10cm
steel pipe (k-16 W/m-K)
wrapped with a layer of 5-
cmthick insulation (k=0.1W/m-
K). The heat transfer coefficient
inside and outside the pipe is
2000W/m²K and 200W/m²-K,
respectively. Determine the heat
flow through the pipe if the
water is at 80°C and the air
outside is at 20°C.

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