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Water flowing at a rate of 0.02 kg/s is heated from 20 to 60°C in a horizontal pipe (inside diameter 2.5 cm). The inside pipe surface temperature is 90°C. Estimate the convective heat-transfer coefficient if the pipe is m long.Known:Density of water is 992.2 kg/m³Specific heat of water is 4.175 kJ/(kg·°C)Thermal conductivity of pipe is 0.633 W/(m·°C)Viscosity of fluid in the pipe is 658.026 × 10⁻⁶ Pa·sViscosity of fluid at the wall (90°C) is 308.909 × 10⁻⁶ Pa·s
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