A G2 I star is ____________________ in diameter and ____________________ luminous than the sun
Fill in the blank(s) with correct word
Larger; more
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Visiting comets and asteroids: In recent years, several space probes have been sent to comets and asteroids to physically interact with them
Briefly describe three of these missions, and compare how each allows astronomers to better study the composition of these objects.
What is the resistance of a 120-W incandescent lamp connected to a 120-V power supply?
A) 1 ohm B) 60 ohms C) 100 ohms D) 144 ohms E) none of the above
Two ice skaters, one with a mass of 45 kg and the other with a mass of 60 kg, push off against one another starting from a stationary position. After they have pushed off, the relative speed at which they separate is 0.600 m/s. What is the speed of the 60-kg skater?
A) 0.343 m/s B) 0.257 m/s C) 0.375 m/s D) 0.750 m/s E) 0.225 m/s
Kirkwood gaps in the asteroid belt occur at distances where
A) the density of asteroids is high enough for a large collision to pulverize a number of asteroids. B) the period of an orbiting asteroid would be a simple fraction (like 1/3 or 1/4 ) of Jupiter's orbital period. C) the period of an orbiting asteroid would be the same as Mars's orbital period. D) the orbit would take the asteroid beyond the "frost line" in the solar system. E) the period of an orbiting asteroid would be the same as Jupiter's orbital period.