Friday

January 30, 2015

January 30, 2015

Posted by **Help!!** on Wednesday, April 27, 2011 at 8:22pm.

- Chemistry -
**DrBob222**, Wednesday, April 27, 2011 at 11:18pmI assume the half life is 64 days and you want to reduce the radiation to 1/8 of its original value.

k = 0.693/t_{1/2}and substitute this into the below equation.

ln(No/N) = kt.

No = 100 (an arbitrary number I picked).

N = 12.5 (100/8) = 12.5

k from above.

Solve for t in days.

**Answer this Question**

**Related Questions**

chemistry - Strontium-90 decays through the emission of beta particles. It has ...

Chemistry - The half-life for beta decay of strontium-90 is 28.8 years. A milk ...

AP Environmental Science (URGENT) - Strontium-90 is a radioactive waste product ...

Calculus - The half-life of radioactive strontium-90 is approximately 31 years. ...

calculus - In the early 1960s, radioactive strontium-90 was released during ...

Calculas - In the early 1960s, radioactive strontium-90 was released during ...

Math - The half-life of radioactive strontium-90 is approximately 32 years. In ...

Math - The half-life of radioactive strontium-90 is approximately 28 years. In ...

Calculus - The half-life of radioactive strontium-90 is approximately 31 years. ...

Calculus - [Exponential growth & decay] The half-life of radioactive strontium-...