The fact that most moons always show the same face to their planet is
A) very surprising and a great mystery.
B) a natural consequence of the fact that the entire solar nebula rotated in the same direction.
C) explained by the law of conservation of angular momentum.
D) a natural consequence of tidal forces acting on the moons.
E) a result of the fact that the moons once had atmospheres.
D
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A 2000. kg car, traveling to the right at 30. m/s, collides with a brick wall and comes to rest in 0.20 s. The average force the car exerts on the wall is
A) 60. kN. B) 300 kN. C) 600 kN. D) 12. kN. E) 30. kN.
Rasterizing is the process of creating an image one ______ at a time.
A. megabyte B. bit C. GIF D. map
According to our present theory of solar system formation, which of the following lists the major ingredients of the solar nebula in order from the most abundant to the least abundant?
A) hydrogen and helium gas; hydrogen compounds; rock; metal B) hydrogen compounds; hydrogen and helium gas; metal; rock C) hydrogen and helium gas; rock; metal; and hydrogen compounds D) hydrogen; water; methane; and helium
Fluid Flow: For a certain patient, the build-up of fatty tissue on the wall of an artery has decreased the arterial radius by 10%. By how much would the pressure provided by the heart have to be increased to maintain a constant volume of blood flow? Model the blood as an ideal incompressible fluid.
A. 48% B. 52% C. 46% D. 54%