The half-life of 131I is 8.04 days. Three days after it was prepared, its activity was 0.50 ?Ci. How many curies (in ?Ci) were initially prepared?

a. .60
b. .70
c. .65
d. .55
e. .39


c

Physics & Space Science

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Which of the following statements are correct? (There could be more than one correct choice.)

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A Sun-like star will experience a helium flash in the core if

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Graphical Analysis: The figure shows a graph of the velocity of an object as a function of time. What is the acceleration of the object at the following times?(a) At 1.0 s(b) At 3.0 s

What will be an ideal response?

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A series circuit consists of a 0.55-H inductor with internal resistance of 8.0 ? connected in series with a 4.0-? resistor, an open switch, and an ideal 12-V battery

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Physics & Space Science