Thursday

March 5, 2015

March 5, 2015

Posted by **Mira** on Wednesday, August 1, 2012 at 2:37am.

- physics -
**bobpursley**, Wednesday, August 1, 2012 at 8:39am.1=e^-.693t/6.93

.1=e^-.1

ln.1=.1t

t=-10ln(.1)

**Answer this Question**

**Related Questions**

calc - The half-life of polonium is 139 days, but your sample will not be useful...

Chemistry - A radioactive element has a half-life of 6.41 days. What percent of ...

Physical Science- Help Please! - Suppose that you are given a 100 gram sample of...

math - You have just isolated a new radioactive element. If you can determine ...

chemistry - The half-life for the radioactive decay of calcium-47 is 4.5 days.If...

Physics 30 - The activity of a sample of a radioactive isotope is 1800Bq. If ...

Pre-Calc - A radioactive isotope has a half life of 8.1 days. If the sample ...

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

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

chemistry - A radioactive sample contains 2.45 g of an isotope with a half-life...