Air in piston-cylinder assembly undergoes
athermodynamic cycle consisting of three internally
reversibleprocesses in series:
process 1-2: constant volume heating from t1=288k, p1=0.1mpa
top2=0.42mpa
process 2 -3: constant pressure cooling
process 3-1: isothermal heating to the initalstate
employing the ideal gas model with cp=1 kj/kg*k, evaluate
thechange in specific entropy, in kj/kg*k, for each process. sketch
the cycle on p-v and t-s coordinates. for eachprocess, associate
work and heat transfer with areas on thesediagrams,
respectively.

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.