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?

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.