Planetary systems discovered around other stars
A) all have exactly the same layout as the planets in our own solar system
B) all have completely different layouts as the planets in our own solar system
C) exhibit a range of different layouts, some being very similar to our solar system while others being very different
D) all have very similar but not identical layout to our solar system
C
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Nuclear Reactions: Determine the missing product X in the following nuclear reaction: 
O + neutron ? X + alpha particle
Fill in the blank(s) with the appropriate word(s).
Which of the following celestial objects do not rise in the east and set in the west? (Assume that all of these objects are visible from your location on Earth, and that none of them are circumpolar.)
A) stars B) the Sun C) the Moon D) galaxies E) All of these objects rise in the east and set in the west.
What is the resistance of a 120-W incandescent lamp connected to a 120-V power supply?
A) 1 ohm B) 60 ohms C) 100 ohms D) 144 ohms E) none of the above
You have two identical pure silver ingots. You place one of them in a glass of water and observe it to sink to the bottom. You place the other in a container full of mercury and observe that it floats
Comparing the buoyant forces in the two cases you conclude that A) the buoyant force in the water is equal to that in mercury. B) the buoyant force in the water is larger than that in mercury. C) the buoyant force in water is smaller than that in mercury. D) the buoyant force in the water is zero and that in mercury is non-zero. E) No conclusion can be made about the respective values of the buoyant forces.