Acylindrical specimen of aluminum (al) having a diameter of 19 mm and length of 200 mm is deformed elastically in tension with a force of 48,800 n. given the young’s modulus of 69 gpa and the poisson’s ratio of 0.33 for al, determine the following: (a) the amount by which this specimen will elongate in the direction of the applied stress. (b) the change in diameter of the specimen. will the diameter increase or decrease data for aluminum from table 6.1:

modulus of elasticity 69 gpa or 10 106psi

shear modulus 25 gpa or 3.6 106psi

poisson ratio 0.33

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Prove the equivalence between the two statements of the 2nd law of thermodynamics (i. e., a violation of one statement leads to the violatio the other statement)