Sure! Here’s a transcription of the text with an educational focus:---**Problem 8: Heat Transfer in a Cubical Building***Scenario:*Consider a cubical building with sides of length \( 7 \, \text{m} \). The walls are composed of concrete with a thickness of \( 0.25 \, \text{m} \) and possess a thermal conductivity of \( 0.8 \, \text{W/m} \cdot \degree \text{C} \). The exterior temperature is \( T_{\text{out}} = -5 \degree \text{C} \), while the interior temperature is \( T_{\text{in}} = 20 \degree \text{C} \).*Task:*Determine the amount of energy (in joules) that the heating system must supply over a 12-hour period to maintain a constant inside temperature. Assume that heat loss occurs only through the five sides of the cube, excluding the floor.*Instructions:*Show your calculations and reasoning.*Key Concepts Involved:*- **Heat Transfer Calculation**: Use the formula for heat conduction.- **Thermal Conductivity**: Understand how this property affects heat transfer.- **Real-world Application**: Consider this a practical exercise in energy management for buildings.---No graphs or diagrams accompany this problem, but visualizing the cube and temperature gradients can help in understanding the context.

Given : The sides of the cubical building is l=7 m. The thickness of a wall is w=0.25 m. The thermal…

Answered: 8. Consider a cubical building with…

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