A house has a composite wall of wood, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold winter day, the convection heat transfer coefficients are 60 W/m2·K and 20 W/m2·K. The total wall surface area is 200 m2. The plaster board thickness is 10 mm, the glass fiber thickness is 100 mm, and the plywood siding thickness is 20 mm. The temperature inside is 20°C and the temperature outside is -15°C . Determine the total heat loss through the wall.

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.