The following statements are all true. Which one counts as an "exception to the rule" in being unusual for our solar system?
A) The diameter of Earth's Moon is about 1/4 that of Earth.
B) Venus does not have a moon.
C) Jupiter has a small axis tilt.
D) Saturn has no solid surface.
A) The diameter of Earth's Moon is about 1/4 that of Earth.
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Which of the following best describes a filtergram?
A) It is a region inside a star where energy is carried outward as rising hot gas. B) It is composed of ionized gas trapped in a magnetic arch rising up through the photosphere. C) It is an atom in which an electron has moved from a lower to a higher energy level. D) It is a photograph taken in the light of a specific region of the spectrum of the Sun.
The intensity of an electromagnetic wave is 8 × 107 W/m2. What is the amplitude of the magnetic field of this wave?
A) 8.2 × 10-4 T B) 3.3 × 10-7 T C) 10 T D) 14 T E) 5.8 × 10-4 T
Which of the following comprise the oldest members of the Milky Way?
A) the Sun and other solar mass stars B) O stars C) red giant stars in spiral arms D) Cepheid variables E) globular clusters
A 1-kg chunk of putty moving at 1 m/s collides and sticks to a 5-kg bowling ball that is initially at rest in space. The bowling ball and putty are then set in motion with a speed of
A) 1/4 m/s. B) 1/5 m/s. C) 1/6 m/s. D) none of the above E) not enough information