Two pipe columns are required to have the same Euler buckling load Pcr. Column 1 has flexural rigidity EI and height L1; column 2 has flexural rigidity (4/3)EI and height L2. The ratio (L2/L1) at which both columns will buckle under the same load is approximately:
(A) 0.55
(B) 0.72
(C) 0.81
(D) 1.10
(C) 0.81
You might also like to view...
Rotational Kinetic Energy: A uniform solid cylinder with a radius of 10 cm and a mass of 3.0 kg is rotating about its center with an angular speed of 33.4 rpm. What is its kinetic energy?
A. 0.18 J B. 0.092 J C. 0.96 J D. 1.1 J E. 17 J
Mars may have been more Earth-like in the past because
A) its atmosphere was thicker and warmer B) it was rotating more rapidly C) the Sun was dimmer, putting out less solar radiation D) it was not as close to the Sun
The position of a mass that is oscillating on a spring is given by x = (18.3 cm) cos[(2.35s-1)t]. What is the frequency of this motion?
A) 0.426 Hz B) 1.34 Hz C) 2.67 Hz D) 0.128 Hz E) 0.374 Hz
Generators that were used in the past to supply electricity in automobiles have been replaced by
A) batteries. B) armatures. C) dynamos. D) alternators. E) commutators.