18. What is the ratio of temperatures T'R/T'L at mechanical equilibrium? ('R': right side; 'L': left side.) (A) 2 (B) 1 (C) 23/5 (D) 25/3 (E) none of the above.

8. Consider a cube of density ρ and horizontal cross-sectional area L² with vertical height L. The cube is floating in a liquid with density ρ_L. At equilibrium a fraction L₀/L of the cube is immersed in the liquid. Now let's push down the cube a little bit and release it. What is the period of the subsequent oscillation? (A) (B)(C)(D)(E) none of the above.

18. What is the ratio of temperatures T'_R/T'_L at mechanical equilibrium? ('R': right side; 'L': left side.)
(A) 2
(B) 1
(C) 2^3/5
(D) 2^5/3
(E) none of the above.

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