A comet that has an extremely elliptical orbit most likely came from
A) the asteroid belt.
B) the Kuiper belt.
C) the Oort cloud.
D) the Trojan asteroids.
E) outside the solar system.
C) the Oort cloud.
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According to the text’s final model (including the ocean effect), about when will the earth’s average surface temperature be 288.4 K?
A. 2015 B. 2030 C. 2045 D. Some other date (specify)
Wire A and Wire B are each carrying the same current. If the diameter of Wire A is twice that of Wire B, how does the drift velocity vdA in Wire A compare to that in in Wire B?
a. vdA = vdB b. vdA = 2 vdB c. vdA = vdB /2 d. vdA = vdB /4
A particle experiences a force given by F(x) = ? - ?x3. Find the potential field U(x) the particle is in. (Assume that the zero of potential energy is located at x = 0.)
A) U(x) = -?x + x4 B) U(x) = ?x - x4 C) U(x) = 3?x2 D) U(x) = -3?x2
Orthoclase and plagioclase are the two major types of ______________
Fill in the blank(s) with correct word