23. Which of the followings is the energy level of the quantum simple harmonic oscillator? (h is the Planck constant, and ω is the angular frequency.) (A) nhω/(2π). (B) (n+1/2)hω/(2π). (C) (n+1)hω/(2π). (D) (n²+1/2)hω/(2π).

4. A point-like bug of mass m lies on the rim of a uniform disk of mass M that can rotate freely about its center. Initially the bug and disk rotate together with an angular velocity ω₀. Then the bug walks half way to the center of the disk. What is ratio of the new kinetic energy of the system to its initial kinetic energy? (A) (4m+2M)/(m+2M) (B) (m+2M)/(4m+2M) (C) (2m+4M)/(2m+M) (D) (2m+M)/(2m+4M)

23. Which of the followings is the energy level of the quantum simple harmonic oscillator? (h is the Planck constant, and ω is the angular frequency.)
(A) nhω/(2π).
(B) (n+1/2)hω/(2π).
(C) (n+1)hω/(2π).
(D) (n²+1/2)hω/(2π).

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