An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 32 . It has been determined that fracture results at a stress of 236 MPa when the maximum (or critical) internal crack length is 2.28 mm. (a) Determine the value of for this same component and alloy at a stress level of 354 MPa when the maximum internal crack length is 1.14 mm.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed

Arigid tank contains 10 kg of air at 137 kpa (abs) and 21°c. more air is added to the tank until the pressure and temperature rise to 242 kpa (abs) and 32°c, respectively. determine the amount of air added to the tank. [r-0.287 kj/kg k]