A rocky leftover planetesimal orbiting the Sun is
A) a comet.
B) a meteor.
C) an asteroid.
D) a meteorite.
E) possibly any of the above
C
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What do our magnetic field and Jupiter's share?
A) Similar field strength B) Same polarity C) Auroral displays in the polar regions D) Fields that extend inward all the way to the Sun E) Fields that extend outward past Pluto
You carry a 20-N box 5 m horizontally across a room. The work you do is __________
Fill in the blank(s) with correct word
To what radius would the sun have to be compressed in order for it to become a black hole? The mass of the sun is 1.99 × 1030 kg, G = 6.67 × 10-11 N ? m2/kg2, and c = 3.00 × 108 m/s
A) 2950 m B) 1470 m C) 6.96 × 108 m D) 2.66 × 106 m E) 3.72 × 104 m
Why do astronomers believe that the Jovian planets must contain rocky material in their cores?
A. Because the Jovian planets have large magnetic fields. B. Because silicates and irons were part of the overall composition of the Solar nebula. C. Because the Jovian planets have large gravity. D. The statement of the question is incorrect. Astronomers believe that the Jovian planets consist exclusively of hydrogen and helium.