Which of the following is true of Uranus?
A) It is the largest planet of the Solar System.
B) It is the brightest natural object in the sky.
C) It rotates backward compared with the other planets.
D) It rotates on its side with its equator almost perpendicular to its orbit.
D
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Refracting Telescope: An astronomical refracting telescope is made from two lenses. The objective lens has a focal length of 114 cm, and the eyepiece lens has a focal length of 17.0 cm.(a) What is the total length of the telescope?(b) What is the angular magnification of the telescope?(c) What is the magnification by turning the telescope around and looking through the objective lens first?
A. (a) 131 cm (b) 6.71 (c) 0.15 B. (a) 97 cm (b) 0.15 (c) 6.71 C. (a) 262 cm (b) 0.87 (c) 1.15 D. (a) 194 cm (b) 1.18 (c) 0.85
A 3.2-L volume of neon gas (Ne) is at a pressure of 3.3 atm and a temperature of 330 K
The atomic mass of neon is 20.2 g/mol, Avogadro's number is 6.022 × 1023 molecules/mol, and the ideal gas constant is R = 8.314 J/mol · K = 0.0821 L · atm/mol · K. The mass of the neon gas is closest to A) 7.9 × 10-3 kg. B) 4.6 × 10-3 kg. C) 3.8 kg. D) 7.8 kg. E) 7.8 × 102 kg.
What is the typical size of most known asteroids?
A) a few meters B) a few kilometers C) a few hundred kilometers D) larger than the Moon E) larger than the Earth
A convex lens has a focal length f. An object is placed between infinity and 2f from the lens along a line perpendicular to the center of the lens. The image is located at what distance from the lens?
A) between the lens and f B) farther than 2f C) between f and 2f D) 2f E) f