While luminous enough to be seen with the naked eye, Supernova 1987A was, in fact, in our companion galaxy, the Large Magellanic Cloud
Indicate whether the statement is true or false
TRUE
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Planet A has twice the mass of Planet B. From this information, what can we conclude about the escape speed for Planet A compared to that of Planet B?
A) The escape speed for Planet A must be twice as great as the escape speed from Planet B. B) The escape speed for Planet A must be four times as great as the escape speed from Planet B. C) The escape speed for Planet A is the same as the escape speed from Planet B. D) The escape speed for Planet A is greater than the escape speed from Planet B, but we cannot say how much greater. E) We cannot conclude anything about the escape speed for Planet A without knowing the radii of the two planets.
Familiar groups of stars that are parts of a constellation or parts of different constellations are called
a. configurations. b. asterisms. c. major sequences. d. local groups.
A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center?
A) 0.15 kg?m2 B) 0.24 kg?m2 C) 0.13 kg?m2 D) 0.17 kg?m2 E) 0.19 kg?m2
Ultraviolet light has ________ wavelength and ________ frequency relative to visible light.
A. shorter; larger B. longer; smaller C. longer; larger D. shorter; smaller