The largest Jovian moons have sizes comparable to Mercury. Why do they have an icy composition compared to Mercury's rocky composition?
A) They are captured comets.
B) They formed from hydrogen compounds expelled by the jovian planets.
C) They experienced many more comet impacts during the heavy bombardment.
D) They formed beyond the frost line, where ices were more abundant than metals and rock.
D) They formed beyond the frost line, where ices were more abundant than metals and rock.
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Young's double slit experiment relies on the ___________________ of light.
A: Dampening B: Interference C: Refraction D: Reflection
Mars' moons are probably captured asteroids.
Answer the following statement true (T) or false (F)
How long will it take if she stays in bed all day?
a. 2.41 hours b. 57.8 hours c. 37.7 hours d. 0.228 hours
A straight wire is carrying a current upward. Observed from above (i.e., looking downward towards the wire), the magnetic field lines are
A. radially outward. B. radially inward. C. forming clockwise circles. D. forming counter-clockwise circles. E. directed toward the observer.