Assuming the stress-strain curves provide here all correspond to the same polymer, which tensile test was most likely performed at the highest temperature above Tg? Choose (e) if none tests likely meet this condition. 80 a 70 60 b 50 Stress (MPa) 40 с 30 20 10 d 0 0.1 0.2 0.3 Strain

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.