Consider the motion of a 1.00-kg particle that moves with potential energy given by U(x) = (-2.00 J?m)/x + (4.00 J?m2)/x2. Suppose the particle is moving with a speed of 3.00 m/s when it is located at x = 1.00 m
What is the speed of the object when it is located at x = 5.00 m? A) 2.13 m/s
B) 3.00 m/s
C) 4.68 m/s
D) 3.67 m/s
D
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Toss a baseball bat into the air and it wobbles about its
A) geometrical center. B) center of mass. C) heavier end.
A 110-V hair dryer is rated at 1200 W. What current will it draw when operating from a 110-V electrical outlet?
A) 90 mA B) 1.0 A C) 5.0 A D) 11 A E) 14 A
The atomic mass of a hypothetical element consisting of 50% 30X and 50% 32X would be about ______________ u
Fill in the blank(s) with correct word
Which of the following is not key evidence in support of the idea that all life today shares a common ancestor?
A) We have identified fossils of the first life forms that ever existed on Earth. B) All life uses DNA and the same genetic code. C) Mapping of gene sequences shows how life is all related. D) All life builds proteins from the same amino acids and uses ATP to store energy in cells.