Assume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are
traveling at 30 mi/h, all vehicles in lane 2 are traveling
at 45 mi/h, and all vehicles in lane 3 are traveling at 60
mi/h. There is also a constant spacing of 0.5 mile
between vehicles. If you collect spot speed data for all
vehicles as they cross your observation point, for 30
minutes, what will be the time-mean speed and spacemean speed for this traffic stream?

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.