Why does Titan have such a nitrogen-rich atmosphere?
A) It was formed that way in the solar nebula.
B) The nitrogen comes from the breakup of ammonia (NH3 ) by solar radiation and subsequent thermal escape of the hydrogen.
C) The nitrogen was formed from the chemical reaction of sulphuric acid with surface rocks.
D) Through the impact of nitrogen rich comets during the early solar system.
E) The nitrogen was created through a chain of fusion reactions in Titan's core.
B
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A water hose has a flow rate of 3.0 kg/s of water. If the velocity of the water as it leaves the hose is 5.0 m/s, then the force to hold the hose is
A. 15 N. B. 26 N. C. 30 N. D. 45 N. E. 57 N.
Express the result of the following calculation, to the proper number of significant figures: (0.02739 ) × (-240,000 )
What will be an ideal response?
Electric forces within an atomic nucleus tend to
A) hold it together. B) push it apart. C) neither of these
The anion in the common ionic substance NaHCO3 is
a. CO32-. b. H+. c. Na+. d. HCO3-.