Iron meteorites are believed to come from:
A) the core of a dense M-type asteroid, now broken up.
B) Mars, hence their reddish color.
C) the crust of a differentiated type C asteroid, now broken up.
D) a broken up cometary nucleus, hence their shiny appearance.
E) deep space, far beyond the solar system, hence their unique crystal patterns.
A
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A solar eclipse occurs when the Moon is at or
near a) full phase. b) new phase. c) first-quarter phase. d) last-quarter phase.
Figure Q6.15 below shows a sequence of Stern–Gerlach devices. By analogy to the cases discussed in the chapter, what do you think are the probabilities that an electron entering the last device will come out of that device’s plus and minus channels, respectively? 
A. 1 and 0, respectively (AA if reversed, i.e., 0 and 1)
B. 0.933 and 0.067, respectively (BB if reversed)
C. 
, respectively (CC if reversed)
D. 
for both channels
E. Some other probabilities (specify)
The voltage across the input terminals of a transformer is 120 V. The primary has 25 loops and the secondary has 50 loops. The voltage the transformer delivers is
A) 30 V. B) 60 V. C) 120 V. D) 240 V. E) none of the above
Humans have existed on Earth for about _____
A) 4 million years B) 5 million years C) 6 million years D) 7 million years