When a contracting hot ball of gas spins into a disk shape, it cools faster due to
A. increased convection currents.
B. decreased insulation.
C. increased radiation transfer.
D. increased surface area.
E. eddy currents.
Answer: D
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What aspect of Titan may hold clues as to what Earth was like before life arose here?
A. an intriguing soup of organic molecules B. the rate of radioactive decay of its inner core C. its intense volcanic activity D. its expansive liquid oceans
A heavy rock and a light rock in free-fall have the same acceleration. The reason the heavy rock doesn't have a greater acceleration is that the
A) force due to gravity is the same on each. B) air resistance is always zero in free fall. C) inertia of both rocks is the same. D) ratio of force to mass is the same. E) none of the above
The wet bulb depression depends on:
A) air pressure. B) air temperature. C) air moisture content. D) air composition.
These rounded granite outcrops are the result of which weathering process?
A) Carbonation B) Hydration C) Oxidation D) Spheroidal weathering