The Milky Way and the Milky Way Galaxy are the same thing
a. True
b. False
Indicate whether the statement is true or false
False
RATIONALE: Refer to the Glossary.
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Spherical Mirrors: An object is placed 50 cm in front of a concave mirror with a focal length of 25 cm. What is the magnification produced by the mirror?
A. -0.50 B. -1.0 C. +1.5 D. -2.0 E. +1.0
A large gas cloud in the interstellar medium that contains several type O and B stars would appear to us as:
A) a dark nebula. B) an emission nebula. C) bright blue. D) a reflection nebula. E) a dark patch against a bright background.
A ball is thrown with an initial speed of 60 m/s at an angle of 30° above the horizontal. What is the ball's horizontal displacement at the end of 4 seconds? Use g = 10 m/s2
A) 240 m B) 60 m C) 120 m D) 210 m E) 140 m
Optical fibers work because of
a. interference. b. diffraction. c. total internal reflection. d. diffuse reflection. e. polarization.