For the solid shaft given in the video, the maximum (i. e. principal) normal stress at point a, σ1 is:

What precautions should you take to prevent injuries when dealing with heavy loads?

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k

Brief discuss how the presence of dislocations in crystal structures can be an advantage and a disadvantage to engineer and designers.