Every year, new records in track and field events are recorded. let's take an historic look back at some exciting races.

on august 20, 1989, in cologne, west germany, said aouita of morocco also established a world record when he ran the 3000. m run in 7.00 minutes, 29.45 seconds. what was his average speed (in m/s) for the race? remember to include your data, equation, and work when solving this problem.

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)