Consider two uniform solid spheres where one has twice the mass and twice the diameter of the other. The ratio of the larger moment of inertia to that of the smaller moment of inertia is
A) 10.
B) 8.
C) 2.
D) 6.
E) 4.
Question 2In a particular case of Compton scattering, a photon collides with a free electron and scatters backwards. The wavelength after the collision is exactly double the wavelength before the collision. What is the wavelength of the incident photon?
A) 3.6 10-12 m
B) 4.8 10-12 m
C) 2.4 10-12 m
D) 1.2 10-12 m
E) 6.0 10-12 m
Question 3A stick is moving along the x-axis at 90c. A person riding with the stick sees it inclined at 45. with respect to the x-axis. Observers in the rest frame see the stick making what angle with respect to the x-axis?
A) 79.
B) 66.
C) 53.
D) 45.
E) 88.
Question 4The moment of inertia of a uniform rod (about its center) is given by I = ML2/12. What is the kinetic energy of a 120-cm rod with a mass of 450 g rotating about its center at 3.60 rad/s?
A) 0.350 J
B) 4.20 J
C) 0.700 J
D) 0.960 J
E) 2.10 J
Question 5According to the selection rules, which of the following transitions is not allowed:
A) n = 3, = 2 to n = 2, = 1
B) n = 4, = 3 to n = 3, = 2
C) n = 3, = 1 to n = 1, = 0
D) n = 2, = 1 to n = 1, = 0
E) n = 4, = 2 to n = 3, = 2
Question 6Which of the following is NOT a conventional spacecraft design?
A) a matterantimatter rocket
B) a chemical rocket
C) a solar sail
D) a nuclear rocket
Question 7A 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 3.5 rad/s. What is its kinetic energy?
A) 0.18 J
B) 0.092 J
C) 0.96 J
D) 1.05 J
E) 0.53 J
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