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Q1. The brick wall (of thermal conductivity 0.91 W/m*degrees C) of a building has dimensions 2.9 m by 6 m and is 18 cm thick. How much heat flows during the wall in a 6.9 hour period when the average inside and outside temperature are, in that order, 25 degrees C and 2 degrees C? respond in units of MJ

Q2. A stone takes 0.28s to travel past a window 2.2m tall. From what height above top of the window did the stone fall?

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