When an atom absorbs a photon containing energy, any of the following can happen except which?
A) The atom becomes excited.
B) The atom is ionized.
C) An electron moves from an upper energy level to a lower one.
D) An electron moves from a lower energy level to an upper one.
C
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You are alone in space and your tether brakes and you are floating motionless relative to your spaceship, which is located a frustrating 10 meters away. Your spacesuit has no jet pack and you have no air to spare. All you have is your wrench. How can you return to your ship?
Fill in the blank(s) with the appropriate word(s).
Coulomb's Law: Two equal and opposite charges are a small distance apart, forming an electric dipole. A positive charge +q is placed above these charges, as shown in the figure, equidistant from both of them. Which diagram below best gives the direction of the net force the dipole exerts on the charge +q?
A. 
B. 
C. 
D. 
Energy and Momentum: A firecracker explodes in midair and breaks up into many fragments. Which of the following statements are true regarding conditions immediately before and immediately after the explosion?I. The total momentum of the fragments is equal to the original momentum of the firecracker.II. The total kinetic energy of the fragments is equal to the original kinetic energy of the firecracker.
A. Statement I only B. Statement II only C. Both Statement I and Statement II D. Neither statement is true.
If the image distance is negative, the image formed by a mirror is a(n)
A) real image. B) virtual image. C) imaginary image. D) positive image. E) negative image.