Question

A house has a brick wall of thickness 10 cm and height 3 m. its length and width are 30 m and 20 m respectively. if the temperature is -5c outside and 25c inside, then the power conducted through the walls is about

Answer 1

The power conducted through the walls is about 334,800 watts.

Step-by-step explanation:

The power conducted through the walls can be calculated using the formula for heat conduction:

Power = (Thermal Conductivity * Area * Temperature Difference) / (Thickness)

Given that the thickness of the brick wall is 10 cm, the height is 3 m, the length is 30 m, and the width is 20 m, we can calculate the area as 2 * (length * height + length * width + height * width), which is 2 * (30 * 3 + 30 * 20 + 3 * 20) = 1860 m². The thermal conductivity of brick can vary, but for this calculation, let's assume it is 0.6 W/m/°C.

The temperature difference is 25°C - (-5°C) = 30°C. Plugging in the values into the formula, we have:

Power = (0.6 * 1860 * 30) / 0.1 = 334,800 W

Therefore, the power conducted through the walls is about 334,800 watts.