Two rooms, each a cube 4 m per side, share a 10.9-cm thick brick wall. Because of a number of 100-W lightbulbs in one room, the

Question

Two rooms, each a cube 4 m per side, share a 10.9-cm thick brick wall. Because of a number of 100-W lightbulbs in one room, the air is at 24 deg C, while in the other room it is at 14 deg C. How many of the 100-W bulbs are needed to maintain the temperature difference across the wall? kbrick = 0.84 W/m.K

Round your answer to 2 decimal places.

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