Calculate the bending stress in a 1 ¾ in. x 12 in. x 18 ft. microllam lvl beam under the following load conditions: a)-2500 lb concentrated load at center with the beam fixed at both ends. b)-70.0 lb/ft uniform load with the beam fixed at both ends. c)-is the calculated stress acceptable?

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?