An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 39 . it has been determined that fracture results at a stress of 208 mpa when the maximum (or critical) internal crack length is 2.82 mm. a) determine the value of for this same component and alloy at a stress level of 270 mpa when the maximum internal crack length is 1.41 mm.

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

In which of the following is positive work done by a person on a suitcase