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Two rooms, each a cube 4.0 mper side, share a 14-cm thick brick wall. Because of...

Two rooms, each a cube 4.0 mper side, share a 14-cm thick brick wall. Because of a number of 100-W lightbulbs in one room, the air is at 34 ∘C, while in the other room it is at 10 ∘C.

How many of the 100-W bulbs are needed to maintain the temperature difference across the wall?

Express your answer as an integer.

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