試卷名稱:106年 - 學士後西醫物理及化學106物理#77053
年份:106年
科目:學士後西醫物理及化學
51. The diagram shows a U-tube having cross-sectional area A and partially filled with oil of density . A solid cylinder, which fits the tube tightly but can slide without friction, is placed in the right arm. The system reaches equilibrium. The weight of the cylinder is: 
(A) ALρg
(B) L 3 ρg
(C) Aρ(L + h)g
(D) Aρ(L – h)g
(E) None of the above.