An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of . it has been determined that fracture results at a stress of 250 mpa when the maximum (or critical) internal crack length is 2.0 mm. (a) determine the value of for this same component and alloy at a stress level of 325 mpa when the maximum internal crack length is 1.0 mm. (b) under these circumstances will the component fail?

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.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

The higher the astm grain size number, the finer the gran is. a)-true b)-false