Water, initially a saturated liquid at 140 oC, is contained in a piston-cylinder assembly. Thewater is heated to the corresponding saturated vapor state in an internally reversible process atconstant temperature and pressure. For a dead state at To= 20 °C and po= 1 bar, determine in kJ/kg:

(a) The change in exergy
(b) The exergy transfer accompanying heat
(c) The exergy transfer accompanying work
(d) The exergy destruction

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

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.

Asteel wire of 2 mm diameter is fixed between two points located 2 m apart. the tensile force in the wire is 250n, if its density of steel is given by 7830 kg/m3 the fundamental frequency of vibration hz? ?