A particle in a rigid box has a ground state energy of 4 MeV. What is the least energy this system can absorb?
A)
16 MeV
B)
4 MeV
C)
25 MeV
D)
12 MeV
E)
8 MeV
D
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Consider two unequal masses, M and m. Which of the following statements is false?
A) It is possible for the center of mass to lie within one of the objects. B) The center of mass is closer to the larger mass. C) The center of mass lies on the line joining the centers of each mass. D) If a uniform rod of mass m were to join the two masses, this would not alter the position of the center of mass of the system without the rod present.
When a star's inward gravity and outward pressure are balanced, the star is said to be
A) in hydrostatic equilibrium. B) in gravitational collapse. C) a stage 2 protostar. D) in thermal expansion. E) in rotational equilibrium.
A particle carrying a charge of +e travels in a circular path of radius R in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been
A) 4R. B) 2R. C) R/4. D) R/2. E) 8R.
While a camera has film where the image is formed, the eye forms the image on the:
a. cornea. c. pupil. b. optic nerve. d. retina.