A construction project is being planned that requires the moving of light trucks in and out of the site. Estimate the Emission Factor (EF) and the daily emissions of PM2.5 caused by driving 125 light duty vehicles 75 miles each per day on an unpaved public road to and from a construction site at an approximate speed of 35 mph when the soil contains 40% silt, 3% moisture. No rainfall is expected during the construction and no dust controls will be attempted (10 points). Be careful with the units.

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.