An aluminum tube (E 5 72 GPa) AB of circular cross section has a pinned support at the base and is pin-connected at the top to a horizon-tal beam supporting a load Q 5 600 kN. The outside diameter of the tube is 200 mm and the desired factor of safety with respect to Euler buck-ling is 3.0. The required thickness t of the tube is most nearly:
(A) 8 mm
(B) 10 mm
(C) 12 mm
(D) 14 mm
(B) 10 mm
You might also like to view...
Lilies in a certain pond double their total lake area covered every week. One day you notice that the pond is 1/8 covered with lilies. How long will it be before the pond is totally covered with lilies?
A) 3 weeks B) 8 weeks C) 6 weeks D) 4 weeks E) It is impossible to answer this without knowing the total area of the pond.
A(n) ____________________ telescope has an objective that is a lens
Fill in the blank(s) with correct word
Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the water pressure greatest?
A) at point A B) at point B C) It is the same at both A and B.
A 3.0-kg ball with an initial velocity of 
m/s collides with a wall and rebounds with a velocity of 
m/s. What is the impulse exerted on the ball by the wall?
A.
N
sB.
N
sC.
N
sD.
N
sE.
N
s