The mass of Pluto is 1.31 × 1022 kg and its radius is 1.15 × 106 m. What is the acceleration of a freely-falling object at the surface of Pluto if it has no atmosphere? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 9.81 m/s2 B) 1.62 m/s2 C) 3.72 m/s2 D) 0.661 m/s2 E) 0.140 m/s2
D
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A(n) ____ emits large amounts of energy but photographically appears to be a single point of light much like a star
a. a planet like Venus b. E galaxy c. spiral galaxy d. double-lobed radio galaxy e. quasar
Vision Problems: A machinist with normal vision has a near point at 25 cm. This machinist wears +4.25-diopter eyeglasses in order to do very close work. With these eyeglasses, what is the near point of the machinist? Assume that he wears the glasses extremely close to his eyes.
A. 12 cm B. 10 cm C. 7 cm D. 15 cm E. 17 cm
In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state n = 2?
A) -1.51 eV B) -6.79 eV C) -3.40 eV D) -4.53 eV E) -5.89 eV
The most common extrusive rocks are generated from
A) andesitic magma. B) granitic magma. C) basaltic magma. D) none of the above