The energy that stirs the circulation in Jupiter's atmosphere comes from ________.
A. the tidal force of the Galilean moons
B. the planet's magnetic field
C. the planet's interior
D. the Sun
Answer: C
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Which of the following people reorganized the spectral classification scheme into the one we use today and personally classified over 400,000 stars?
A) Annie Jump Cannon B) Williamina Fleming C) Cecilia Payne-Gaposchkin D) Henry Draper E) Edward Pickering
Mary and Debra stand on a snow-covered roof. They both throw snowballs with the same initial speed, but in different directions
Mary throws her snowball downward, at 30° below the horizontal; Debra throws her snowball upward, at 30° above the horizontal. Which of the following statements are true about just before the snowballs reach the ground below? (There could be more than one correct choice.) A) Debra's snowball will stay in the air longer than Mary's snowball. B) Mary's snowball will stay in the air longer than Debra's snowball. C) Both snowballs will take the same amount of time to hit the ground. D) Debra's snowball has exactly the same acceleration as Mary's snowball. E) Mary's snowball has a greater downward acceleration than Debra's snowball.
Most galaxies in the Local Group are:
A) dwarf spirals. B) small irregulars similar to the Magellanic Clouds. C) larger spirals than either the Milky Way or M-31 in Andromeda. D) dwarf ellipticals, similar to the companions of M-31. E) brown dwarfs, with even more dust than our own Galaxy.
Capacitance is o A/d for
A) all capacitors. B) parallel wires. C) parallel plates. D) concentric cylinders.