A series of n uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the nth shell is
a. ?nq.
b. ?(ln n)q.
c. +q.
d. +(ln n)q.
e. +nq.
c
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The horizontal surface on which the objects slide is frictionless. If F = 12 N, what is the tension in string 1?
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If the communication lifetime of civilizations in our galaxy is 100 million years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?
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A saber-toothed-tiger's bones contain 1/32 of the amount of 14C that is contained in the bone material of living animals. The half-life of 14C is 6000 years. From this information, we can conclude
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