Fine silica flour (fine powder) added to a polymer is a(n) _____________.
Fill in the blank(s) with the appropriate word(s).
filler
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In the context of light curves, observations of an eclipsing binary system can directly tell astronomers not only the masses of its stars but also their _____
A) orbital periods B) diameters C) intensity of magnetic fields D) temperatures
The diagram shows a planet at four positions in its orbit. At which position does it have the greatest angular momentum?
A) 1 B) 2 C) 3 D) 4 E) The angular momentum is the same at all four points.
what is the Saros cycle
a) the period between total solar eclipses b)the period between a total solar eclipse and a total lunar eclipse c) the 18-year cycle over which the pattern of eclipses repeats
Resistances connected in series all have
A. the same current.
B. the same potential difference.
C. different currents.
D. the same charge.
