Ahigh-strength pressure vessel steel (hy130) has a yield strength (y. s.) of 1,460 mpa and a kic of 98 mpa m1/2. calculate the size of a surface crack that will lead to catastrophic failure at an applied stress of
(a) 1/2 y. s. and
(b) 2/3 y. s. (y = 1) (see example 8.2)

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?

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

How can waves travel through ground?