Fermium-253 has a half-life of 3.00 days. A sample of fermium has 7.37 × 107 nuclei. How long will it take for there to be only 3.36 × 106 fermium nuclei in this sample?

A)

2.75 days
B)

9.80 days
C)

13.4 days
D)

15.7 days
E)

58.6 days


C

Physics & Space Science

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In England in the Middle Ages an extensive system of canals was used for transportation. Some of these canals crossed over canyons by flowing over bridges (viaducts). Suppose that a heavily loaded barge crossed over such a waterway bridge

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Work is done on an object to increase its total energy. Which one of the following is true?

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The atmosphere of Titan is chiefly

A) ammonia. B) nitrogen. C) oxygen. D) methane. E) hydrogen.

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