Polyester is considered non-biodegradable. Eventually it will break down, but like nylon and rayon, it can take up to 200 years to fully decompose.
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250 years;-)
a while
Sheet metal can take hundreds to thousands of years to decay, depending on factors such as the environment and the type of metal.
132g
Nuclear waste can take thousands to millions of years to decay completely, depending on the type of radioactive material.
The fustion will take place so long as the decay time for isotopes which is ...not stable is over.
a few months
It will take two half-lives or about 60.34 years for three-fourths of a Cs-137 sample to decay.
it takes 1 day 17 hours and 29 minutes for orange juice to rot or decay
10.76 days
It will take twice the half-life of the radioactive material for it to decay through two half-lives. If the half-life is 1 hour, it will take 2 hours for the material to decay through 2 half-lives.