Evidence for the big bang comes from
A) observations of the pulsations of distant neutron stars.
B) observation of the cluster of stars near the center of the Milky Way galaxy.
C) the observation that the galaxies are all receding from each other.
D) All of the above.
E) None of the above.
C
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The subduction zone of converging oceanic plates is
marked by a)isolated volcanic mountains such as the Hawaiian Islands. b) a deep oceanic trench. c) a fold mountain range. d) the Moho discontinuity.
An object 4 cm high is placed 15 cm in front of a convex mirror with a focal length of ?10 cm. What is the image position (in cm)?
a. ?8 b. ?4 c. ?2 d. ?6 e. 30
Photoelectric Effect: When a metal is illuminated by light, photoelectrons are observed provided that the wavelength of the light is less than 520 nm. What is the metal's work function? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 2.4 eV B. 2.6 eV C. 2.8 eV D. 3.0 eV
The precession of the Moon's nodes means that
A) there are never two solar eclipses in the same year. B) the vernal equinox will be in Aquarius in a few hundred years. C) there is a lunar eclipse every 6 months. D) there is a solar eclipse every 6 months. E) the eclipse seasons occur less than 6 months apart.