14. What is the momentum of the scattered particle? (A) -hc(1/λ + 1/λ') (B) hc(1/λ - 1/λ') (C) h(1/λ + 1/λ') (D) h(1/λ - 1/λ') (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.

14. What is the momentum of the scattered particle?
(A) -hc(1/λ + 1/λ')
(B) hc(1/λ - 1/λ')
(C) h(1/λ + 1/λ')
(D) h(1/λ - 1/λ')
(E) none of the above.

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