Hot combustion gases of a furnace are flowing througha concrete chimney (k =1.4 W/m · °C) of rectangular cross section. The flow section of the chimney is 20 cm ×40 cm, and the thickness of the wall is 10 cm. The average temperatureof the hot gases in the chimney is Ti=280°C, and the averageconvection heat transfer coefficient inside the chimney is hi=75 W/m2· °C. The chimney is losing heat from its outer surfaceto the ambient air at To=15°C by convection with a

answer:

6.3 is the answer

explanation:

because it is the ex

answer:

1: productivity. productivity is an important reason for developing it systems.

2: information. it systems are key to delivering the information and intelligence you need to improve innovation.

3: cost reduction.

4: collaboration.

5: customer service.

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Explanation: