As time goes by, everything decays in various ways".
It decays in damp ground, if buried, and above ground suffers meticulous reuse until the last threads became paper.
The short half-life of sex decays in the room, and the talk is of true love driven into hiding by money troubles, including Sam's alimony payments.
But the only known radioactive version of carbon was carbon-11, and half of it decays in only 20 minutes, which is known as its half-life.
"Most of the effect of Presidential ads decays in two to three days," Lynn Vavreck, a political scientist at U.C.L.A., who has studied the issue closely, said.
For example, half of the thorium product decays in four days, half the remaining sample in the next four days, and so on.
For example, uranium-238 decays with a half-life of 4.5 billion years into thorium-234, which decays in 24 days into protactinium-234, which also decays.
Although it decays in only 12.3 years, tritium can remain dangerous to humans for hundreds of years when found in the kinds of large concentrations that the test site holds, Dr. Weber said.
And in this respect, at least, fat has an analogue in living matter -- from stems and leaves and worms and such -- that dies and decays in forests and fields and eventually becomes part of the soil.
Some data decays in value over time, while other data sets are evergreen.
We observe multiple decays in the enthalpy change during aging.
