According to our basic scenario of solar system formation, why do the jovian planets have numerous large moons?
A) As the growing jovian planets captured gas from the solar nebula, the gas formed swirling disks around them, and moons formed from condensation accretion within these disks.
B) Because of their strong gravity, the jovian planets were able to capture numerous asteroids that happened to be passing nearby, and these became the major moons of the jovian planets.
C) The large moons of the jovian planets originally formed in the inner solar system and these moons then migrated out to join up with the jovian planets.
D) The many moons of the jovian planets remains one of the unexplained mysteries of the formation of our solar system.
A
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Which of the following is NOT a greenhouse gas?
A) water (H2O) B) molecular oxygen (O2) C) carbon dioxide (CO2) D) methane (CH4)
A starburst galaxy gets this name because
A) it contains far more x-ray bursters than our Milky Way Galaxy. B) it has many stars bursting out of its disk toward intergalactic space. C) it is forming stars so fast that the starburst phase of life must be temporary. D) it contains so many stars that the galaxy's gravity cannot retain them in their orbits.
Heavier stable nuclei tend to have
A) half as many protons as neutrons. B) the same number of neutrons and protons. C) more neutrons than protons. D) no clear trend in the relative number of neutrons and protons. E) more protons than neutrons.
Photoelectric Effect: When the surface of a metal is exposed to blue light, electrons are emitted. If the intensity of the blue light is increased, which of the following things will also increase?
A. the number of electrons ejected per second B. the maximum kinetic energy of the ejected electrons C. the time lag between the onset of the absorption of light and the ejection of electrons D. the work function of the metal E. All of these