Why is Saturn's moon Titan able to retain an atmosphere?
a. Titan only contains light gases which are easy to retain.
b. Titan has a large enough mass and is cold enough.
c. Titan is biologically active.
d. It is so close to Saturn that Saturn's gravity retains Titan's atmosphere.
B
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What is thought to prevent the formation of stars with masses larger than about 300 times that of our Sun?
A) Molecular clouds do not have enough material to form such massive stars. B) Such massive stars would fragment into binary stars because of their rapid rotation. C) Such massive stars would generate so much light that radiation pressure would blow them apart. D) The onset of degeneracy pressure would prevent such massive stars from forming.
Most of the oxygen in living cells is found in
A) carbohydrates B) water C) lipids D) proteins
In a two-slit experiment, monochromatic coherent light of wavelength 600 nm passes through a pair of slits separated by 2.20 × 10-5 m. At what angle away from the centerline does the second dark fringe occur?
A) 4.70° B) 3.51° C) 3.94° D) 1.17° E) 2.34°
What is the greatest difference between quantities described by linear and by exponential growth?
What will be an ideal response?