Sunday

January 25, 2015

January 25, 2015

Posted by **Beth** on Friday, July 27, 2012 at 5:17pm.

- Physics -
**drwls**, Saturday, July 28, 2012 at 3:42amLet N be the number of half-lives.

(1/2)^N = 10^-4

N log(0.5) = log(10^-4)

-0.30103 N = -4

N = 13.29 half-lives

**Answer this Question**

**Related Questions**

Chemistry - How many half lives will it take for a sample of a radioactive ...

physics-Radioactivity - 1) The number of radioactive nuclei in a particular ...

phys - Although most natural potassium nuclei are stable 39K (93.3%) or 41K (6....

SCIENCE - We did a radioactive decay and half life lab with m&ms and I do not ...

physics - Radioactive nuclei are produced in an irradiated sample at the rate of...

Physics ... - 116In nuclei are produced at the rate of 10 s-1. Calculate the ...

physics - 116In nuclei are produced at the rate of 10 s-1. Calculate the ...

science - 116In nuclei are produced at the rate of 10 s-1. Calculate the maximum...

Chem - Suppose that you start with 1000000 atoms of a particular radioactive ...

physics - Suppose 32000 radioactive nuclei are in a sample. About how many ...