Convection is important in stars because it
a. increases the temperature of the star.
b. mixes the gases of the star.
c. transports energy outward in the star.
d. carries the neutrinos to the surface of the star where they can escape.
e. mixes the gases of the star and transports the energy outward in the star.
e
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If we know that a nonzero net force is acting on an object, which of the following must we assume regarding the object's condition? The object is:
a. at rest. b. moving with a constant velocity. c. being accelerated. d. losing mass.
The symbol G is used to represent
a. the acceleration of gravity b. the universal gravitational constant c. grams d. gravity e. none of the above
Resistors in Combination: Two resistors in series are equivalent to 9.0 ?, and in parallel they are equivalent to 2.0 ?. What are the resistances of these two resistors?
Fill in the blank(s) with the appropriate word(s).
A(n) ______ is a comparison of costs spent and income generated.
A. RWD B. SEO C. ROI D. CTA