The name given to the point of a planet's orbit that is closest to the Sun is
a. aphelion.
b. focus.
c. perihelion.
d. solstice.
c
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A ray in air is incident on a glass plate whose index of refraction is 1.42. The angle of refraction is one half the angle of reflection. The angle of refraction is closest to:
A) 45° B) 43° C) 41° D) 39° E) 37°
Consider the circuit shown below. Which of the circuit diagrams below that figure correctly represents the circuit shown? 
Below the Curie temperature barium titanate is ferroelectric, and above the Curie temperature barium titanate is _________.
Fill in the blank(s) with the appropriate word(s).
In order for clouds to form, air must be lifted. The three principal lifting mechanisms are
A) orographic, condensational, and frontal lifting. B) orthographic, conversational, and frontal lobotomy. C) convectional, orographic, and frontal lifting. D) adiabatic, topographic, and inversional lifting.