If you hold a shiny spherical Christmas tree ornament at arm's length and look at your reflection, the image is
A. upright and enlarged.
B. upright and reduced.
C. inverted and enlarged.
D. inverted and reduced.
B. upright and reduced.
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Open spaces in ice crystals contribute to
A) decreased density. B) increased density. C) neither of these
The radius of the earth is 3963 mi. Which one of the following numbers is closest to the surface area of the earth? (1.0 mi = 1609 m)
A) 4.9 × 107 m2 B) 1.3 × 1014 m2 C) 2.6 × 1014 m2 D) 5.1 × 1014 m2
The heat of fusion for ice at 0 
is 333.7 kJ/kg. What is the energy needed to melt 100 grams of ice at 0.00
A. 39.4 kJ B. 12.7 kJ C. 17.5 kJ D. 25.5 kJ E. 33.4 kJ
Tripling the linear size of an object multiplies its area by
A) 3 and its volume by 9. B) 9 and its volume by 18. C) 9 and its volume by 27. D) 27 and its volume by 81. E) none of the above