In the context of planetology, explain the heat of formation
What will be an ideal response?
In planetology, the heat of formation is the heat released by infalling matter during the formation of a planetary body. The heat of formation was tremendous for the Jovian planets. Jupiter must have grown hot enough to glow with a luminosity of about 1 percent that of the present Sun. However, because it never got hot enough to start nuclear fusion as a star would, it never generated its own energy. Jupiter is still hot inside. In fact, both Jupiter and Saturn radiate more heat than they absorb from the Sun, so they are evidently still cooling.
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The main application of PEEK is as a(n) _________material for carbon-fiber-reinforced composites in aircraft.
Fill in the blank(s) with the appropriate word(s).
Addition by 1. Components: Vector 
= 4.00 m points eastward and vector 
= 3.00 m points southward. The resultant vector 
+ 
is given by
A. 5.00 m at an angle of 36.9° south of east. B. 5.00 m at an angle of 53.1° south of east. C. 5.00 m at an angle of 71.6° south of east. D. 5.00 m at an angle of 18.4° south of east. E. 5.00 m at an angle of 26.6° south of east.
Can one see the Moon during the daytime?
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The main reason for the large inefficiency of the automobile is
A) the kinetic principle. B) friction in the moving parts. C) the first law of thermodynamics. D) the second law of thermodynamics. E) unburned hydrocarbons.