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The half life of cobalt 60 is 5.3 yers after 10.6years how much of the original cobalt 60 remains?
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One quarter-Apex
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Approximately what fraction of an original Co-60 sample remains after 21 years?
Half-life is 5.27 years; 21 / 5.27 = 3.99, or almos 4 half-lives; (1/2)4 = 1/16.
What happens to the area of a rectangle if you half the width?
It becomes half of what the original area is.
What is the total number of years that must pass before only 25.00 grams of an original 100.0 gram sample of c-14 remains unchanged?
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 ± 40 ) years. Twice that is ( 11,460 ± 80 ) years
A rope is cut in half and half is discarded From the remaining half 1 quarter is cut off and discarded What fraction of the original rope is left?
3/8
How old is Don Half Pint Santos?
Don "Half Pint" Santos, original Immature band member, is 28 yrs old.
The half-life of cobalt-60 is 5.3 years After years 1 4 of the original amount of cobalt-60 will remain?
After twice the half-life, 1/4 of the original amount remains. After 3 times the half-life, 1/8 of the original amount remains. Etc.
The half life of cobalt 60 is 5.3 years After years 14 of the original amount of cobalt 60 will remain?
10.6 years
After one half-life what percent of the original uranium remains?
By definition, 50%. Half life is the time for half of the original sample to decay.
After three half-lives what fraction of a radioactive sample remains?
1/8 of the original amount remains.
What fraction of an original sample of a radio isotope remains after 3 half-life periods?
One eighth remains.
How much of a radio active parent isotope remains after one half life has pass?
Half the original amount.
How much of an original isotope remains at the end of a second half-life?
One quarter.
How much of a sample of radioisotope remains after one half-life?
One-half of the original amount. That's precisely the definition of "half-life".
What fraction of a radioactive sample remains after one half-life?
Half of the original sample of a radio isotope remains after a half-life period. After two half-life periods, one-fourth of the radio isotope remains.
What is the percentage of radioactive nuclei left after 3 half lives have passed?
12.5%
What percentage of the initial radioactivity of cobalt-60 would be left after being stored for 32 years?
The half life of Cobalt-60 is 5.27 years, so 32 years is almost exactly six half lives. (Which is probably why the question is put this way). Every half life the activity halves, so after six half lives it is reduced by a factor 26, which is 64. Therefore the activity after six half lives is 1/64 of the original level, or 1.56 percent.
How much cesium is left after 4 half-lives?
1/16 of the original sample of any unstable element remains after 4 half lives.
