Best Answer

Half-life is 5.27 years; 21 / 5.27 = 3.99, or almos 4 half-lives; (1/2)4 = 1/16.

Q: Approximately what fraction of an original Co-60 sample remains after 21 years?

Write your answer...

Submit

Still have questions?

Continue Learning about Other Math

2

1.5% remains after 43.2 seconds.

25/100 = 1/4 of the original sample. The "half-life" must pass twice, yielding (1/2) x (1/2) = 1/4 of the original sample. The half-life of Carbon-14 is listed as ( 5,730 Â± 40 ) years. Twice that is ( 11,460 Â± 80 ) years

The Symbol p that denotes sample proportion.

Statistically speaking, the mean is the most stable from sample to sample. Whereas, the mode is the least stable statistically speaking from sample to sample.

Related questions

1/8 of the original amount remains.

One eighth remains.

2

1/32

The fraction that remains is 1/8.

It tells what fraction of a radioactive sample remains after a certain length of time.

An eighth remains.

This fraction is 12,5 %.

1.5% remains after 43.2 seconds.

It is 1/8 .

Enrichment=specific activity of fraction/original specific activity of original sample

By definition, 50%. Half life is the time for half of the original sample to decay.