What (who) is half-life - definition
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Half Life; Half-LIfe; Half-Life (book); Half-Life; Half-Life (disambiguation); Half life (disambiguation); Half Life (song); Half Life (novel); Half-Life (novel)
half-life
![classroom experiment]]](https://commons.wikimedia.org/wiki/Special:FilePath/Dice half-life decay.jpg?width=200 "classroom experiment]]")
![Simulation of many identical atoms undergoing radioactive decay, starting with either 4 atoms per box (left) or 400 (right). The number at the top is how many half-lives have elapsed. Note the consequence of the [[law of large numbers]]: with more atoms, the overall decay is more regular and more predictable.](https://commons.wikimedia.org/wiki/Special:FilePath/Halflife-sim.gif?width=200 "Simulation of many identical atoms undergoing radioactive decay, starting with either 4 atoms per box (left) or 400 (right). The number at the top is how many half-lives have elapsed. Note the consequence of the [[law of large numbers]]: with more atoms, the overall decay is more regular and more predictable.")
also half life
(half-lives)
The half-life of a radioactive substance is the amount of time that it takes to lose half its radioactivity.
N-COUNT
Half-life
Half-life (symbol t1⁄2) is the time required for a quantity to reduce to half of its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable atoms survive.
Wikipedia
Half-life (disambiguation)
Half-life is a mathematical and scientific description of exponential or gradual decay.
Half-life, half life or halflife may also refer to:
Pronunciation examples for half-life
1. And this plutonium has a half-life
What If _ Randall Munroe _ Talks at Google
2. going to live a half life.
A Selfish Plan to Change the World _ Justin Dillon _ Talks at Google
3. It's got a three minute half life.
The Moral Molecule _ Paul Zak _ Talks at Google
4. We often forget that caffeine has a half-life
Matthew Walker _ Sleep in Uncertain Times _ Talks at Google
5. DB: The half-life of that is short.
ted-talks_2716_GretchenCarlsonandDavidBrooks_2017S-320k
Examples of use of half-life
1. "But with the Internet, as all Jews should know, these things have a half–life.
2. It also leaves behind a fine radioactive dust with a half–life of 4.5 billion years.
3. For the next decade and a half, life became more and more complicated and discontent continued to build.
4. "My big sister, my better half, life will never be the same without you," Rolando Moreno said to Yvette Moreno, who died in Sept. 11 attacks.
5. "You‘re living a half–life, being stateless," Hoi Trinh, a Vietnamese–Australian lawyer who spent eight years helping the refugees, said from his office in Manila.