A test vehicle covered a 1 mile section in 1.5 min going against traffic and 2.5min going with traffic. Given that the traffic flow was 800 veh/h and that the test vehicle passed 10 more vehicles than passed it when going with traffic find (a) number of vehicles encountered by the test vehicle while moving against traffic, (b) the speed of th traffic being measured, (c) the concentration of the traffic stream, and (d) whether on its run with traffic the test vehicle was traveling faster or slower than the traffic stream.

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.