Jovian planets are thought to form beyond the frost line of their star systems. How, then, might it be possible for a large moon around a jovian planet to have a habitable surface with liquid water?
A) The moon would need to be locked in synchronous rotation with its planet.
B) The jovian planet would need to have migrated inward to the habitable zone of its star.
C) The moon would need to have a magnetic field.
D) The moon would need to have plate tectonics.
E) The moon would need to have a high density.
B) The jovian planet would need to have migrated inward to the habitable zone of its star.
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When a current flows through a metal wire, the moving charges are
A) only electrons. B) negative metal ions. C) only protons. D) positive metal ions. E) both protons and electrons.
Plane polarized light of intensity 
is sent through a polarizer rotated 45
clockwise to the original plane of polarization and then through a second polarizer rotated 45 
counter-clockwise measured from the original plane of polarization. What is the transmitted intensity?
A. 0.71 
B. 0.50
C. 0.35
D. 0.25
E. 0
Why do scientists say that evolution is a "theory"?
A) because it explains a great deal about life and is supported by an enormous body of evidence B) because they are not very confident that it really happened C) because it is supported by only a small amount of evidence D) because it's really just a guess about how life developed on Earth
A speedy tortoise can run with a velocity of 10.0 cm/s and a hare can run 20.0 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 minutes. The tortoise wins by a shell (20.0 cm). What was the length of the race?