If we use 1 millimeter to represent 1 light-year, about how large in diameter is the Milky Way Galaxy?
A) 100 millimeters
B) 100 meters
C) 1 kilometer
D) 100 kilometers
E) 1 million millimeters
B) 100 meters
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Why do we think that the solar system formed from a rotating, collapsing gas cloud that ended up as a disk orbiting the Sun?
a. Most of the planets revolve and rotate in the same direction and in the same plane. b. We see clouds of gas and dust in space with apparently young stars in them. c. We see disks around young stars. d. All of the above.
How does the axial tilt of Mars compare with our own?
A) Like Jupiter, Mars always keeps its equator pointing at the Sun. B) It is about half our own, 12 degrees. C) It is almost identical to the Earth. D) Like Saturn, it's about 27 degrees. E) Like Uranus, it is 98 degrees and flopped over on its side.
A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 37.2°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?
a. 23.8° b. 103° c. 119° d. 61.0° e. 127°
Two charges of equal magnitude but opposite sign are 10 cm apart. The potential is largest
A. close to the positive charge. B. halfway between the two charges. C. close to the negative charge. D. far away from the two charges.