Aclosed system contains 1.2 kg of air, initially at 250 oc and 900kpa. the system first undergoes a polytropic process (polytropic exponent, n=1.25) to a pressure of 600 kpa, followed by a constant pressureprocess to a temperature of 250 oc and then, finally, an isothermalprocess that returns it to its initial state thus completing a cycle. determine the a)volume of the system (air) at all the statesb)boundary work for each process c)net work (sum of all individual work components) of the cycled)show the processes on a p vs vdiagram

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.