In ambient air at tinf= 35°c for the following configurations: or the tollowing configurations: a)-calculate the total heat transfer (q) from a building with four equally-sized 30m-tall and 15m-wide vertical walls. after sunset, one of the walls is 45°c, and the other three are at 40°c. the roof is 15m by 15m, at a temperature of 50°c.

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.