Careful studies of Earth’s magnetic field for the past 330 million years shows that it has _____________ many times.
Fill in the blank(s) with appropriate word (s)..
Answer: recharged
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As you crawl toward the edge of a large freely-rotating horizontal turntable in a carnival funhouse, the angular momentum of you and the turntable
A) decreases. B) increases. C) remains the same, but the revolutions per minute decrease. D) decreases in direct proportion to your decrease in revolutions per minute. E) none of these
If the Moon were covered with water, tidal effects by Earth would find the Moon with
A) 1 tidal bulge. B) 2 tidal bulges. C) 3 tidal bulges. D) 4 tidal bulges. E) no tidal bulges.
Nuclear Binding Energy: The following masses are known: 
What is the binding energy of 
Ra? (1 u = 931.5 MeV/c2)
A. 1700 MeV B. 1900 MeV C. 2100 MeV D. 2300 MeV E. 2500 MeV
Orphan planets will most likely be found using which method used for finding exoplanets?
A) Doppler B) transit C) microlensing D) astrometric