A major advantage of a Newtonian reflector over a refractor is
A) the elimination of the secondary mirror.
B) the central hole in the mirror is smaller.
C) its compact size.
D) there are only two lenses to grind.
E) the elimination of chromatic aberration.
E
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As with Saturn's F ring, shepherd moons play a major role in the structure of the thin narrow rings around Uranus
Indicate whether the statement is true or false
When blue food coloring is stirred into water, the result is a
A) homogeneous mixture called a solution. B) homogeneous mixture called a suspension. C) heterogeneous mixture called a solution. D) heterogeneous mixture called a suspension. E) pure liquid.
The difference between a DC and an AC generator is that
a. the DC generator has one unbroken slip ring. b. the AC generator has one unbroken slip ring. c. the DC generator has one slip ring split in two halves. d. the AC generator has one slip ring split in two halves. e. the DC generator has two unbroken slip rings.