Suppose the fracture toughness of a titanium alloy has been determined to be 44 mpa. m2, and a penny-shaped crack of diameter 1.6 cm is present in a plate used in uniaxial tension. calculate the maximum allowable stress that can be imposed without fracture. the yield stress of the material is 900 mpa, and the plate thickness is 5 cm.

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery