When a brittle material reaches the fracture stress, the increase in energy necessary to extend a crack in the material is equal to _________.
Fill in the blank(s) with the appropriate word(s).
zero
You might also like to view...
Two wheels have the same total mass M and radius R. One wheel is a uniform disk. The other is like a bicycle wheel, with lightweight spokes connecting the rim to a small hub. Which likely has the larger moment of inertia?
A. The solid disk. B. The wheel with spokes. C. The moment of inertia will be nearly the same for both. D. We need more information to answer.
Weight and g: An astronaut goes out for a "space-walk" at a distance above the earth equal to the radius of the earth. What is her acceleration due to gravity at that point?
A. zero
B. g
C. g/2
D. g/4
E. g/
A circular loop of wire of radius 10 cm carries a current of 6.0 A. What is the magnitude of the magnetic field at the center of the loop? (?0 = 4? × 10-7 T ? m/
A) A) 3.8 × 10-5 T B) 3.8 × 10-7 T C) 1.2 × 10-5 T D) 1.2 × 10-7 T E) 3.8 × 10-8 T
When a tube of diameter d is placed in water, the water rises to a height h. If the diameter were half as great, how high would the water rise?
A) 4h B) h/2 C) 2h D) h/4 E) h