Why does the Moon have a layer of "powdery soil" on its surface?
A) Recent, large impacts shattered lunar rock to make this soil.
B) It is made by the same processes that make powdery sand on Earth.
C) It is the result of countless tiny impacts by small particles striking the Moon.
D) It exists because the Moon accreted from powdery material after a giant impact blasted Earth.
C
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A 1000-kg car traveling at 70 m/s takes 3 m to stop under full braking. The same car under similar road conditions, traveling at 140 m/s, takes ______________ m to stop under full braking
a. 6 b. 1 c. 3 d. 12 e. 11
A diatomic molecule consists of two point masses, m1 and m2, separated by a distance r. If x is the distance from m1 to the center of mass, find the moment of inertia in terms of x about an axis perpendicular to the molecular axis through the center of mass
a. 0 b. m1m2 r2/m1 + m2 c. m1(r ? x)2 + m2x2 d. m1x2 + m2(r ? x)2 e. m2x2 + m1r2
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Indicate whether the statement is true or false