Instructions: On occasion, the notation 
will be a shorthand notation for 
.
Given that 
and 
, what is 
? ?
A.
B.
C.
D.
E.
Answer: A
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Diffraction Gratings: Which of the following changes would increase the separation between the bright fringes in the diffraction pattern formed by a diffraction grating?
A. Increase the wavelength of the light used. B. Increase the separation between the slits. C. Immerse the apparatus in water. D. All of these. E. None of these.
The amount of time between successive passes of any given star across the meridian is
A) 23 hours 56 minutes. B) 24 hours. C) 365.25 days. D) 12 years. E) 26,000 years.
A nearsighted person has a far point that is 4.2 m from his eyes. What focal length lenses must he use in his contact lenses to allow him to focus on distant objects?
A) -4.2 m B) 4.2 m C) -5.2 m D) 5.2 m E) 4.8 m
Suppose that an object’s entropy increases from zero when its thermal energy is U = 0 to some maximum value when U = 
Umax, and then goes back to zero when U = Umax (as shown in the drawing below). The greatest thermal energy U that such an object could have when in thermal equilibrium with a normal object is closest to which of the following?
A. 0
B. 
Umax
C. 
Umax
D. 
Umax
E. Umax
F. Other (specify)