A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a minimum?
A)
at either A or B
B)
midway between A and B
C)
one-third of the way between A and B
D)
one-fourth of the way between A and B
E)
none of the above
B
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The wavelength of a periodic wave is 0.500 m. If the frequency is 400 Hz, then what is the magnitude of the k vector of the wave?
A. 12.6 
B. 14.8
C. 18.4
D. 21.0
E. 25.9
You observe a distant galaxy. You find that a spectral line normally found in the visible part of the spectrum is shifted toward the infrared. What do you conclude?
A) The galaxy is moving away from you. B) The galaxy is moving toward you. C) The galaxy has very weak gravity. D) The galaxy is made purely of hydrogen. E) The composition of the galaxy is changing.
Strictly speaking, it is correct to say that voltage
A) flows through a circuit. B) flows across a circuit. C) is impressed across a device in a circuit. D) all of these
A charged particle is placed at rest in the middle of a vacuum chamber, an enclosure that has been emptied of all matter. Consider some point X near a particular corner of the chamber
Neglecting all influences other than the charged particle, what can be said regarding electric fields and electric forces at point X? A) The is an electric field at X, but no electric force. B) There is both an electric field and an electric force at X. C) There is neither an electric field nor an electric force at X. D) There is no electric field at X but there is an electric force at X. E) It is impossible to answer this question without knowing what kind of charge the particle has.