half-life n 1.(General Physics) the time taken for half of the atoms in a radioactive material to undergo decay. Symbol:τ 2.(Biology) the time required for half of a quantity of radioactive material absorbed by a living tissue or organism to be naturally eliminated (biological half-life...
In this article, we will discuss about half life, mean life, life definition radioactivity and more. Half - life is an important topic of physics, students need to learn it and try to solve numerical questions based on these topics. Half – life or formerly known as Half – life period ...
Intuitively, you would expect the activity of a source to depend on two things: the amount of the radioactive substance present, and its half-life. The greater the number of radioactive nuclei present in the sample, the more will decay per unit of time. The shorter the half-life, the m...
half-life noun /ˈhɑːf laɪf/ /ˈhæf laɪf/ [countable] (physics)the time taken for theradioactivityof a substance to fall to half its original value Questions about grammar and vocabulary? Find the answers withPractical English Usageonline, your indispensable guide to ...
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half-life n 1.(General Physics) the time taken for half of the atoms in a radioactive material to undergo decay. Symbol:τ 2.(Biology) the time required for half of a quantity of radioactive material absorbed by a living tissue or organism to be naturally eliminated (biological half-life...
An analysis of journal downloads has found that it can take more than six years for papers in physics to reach one half of the number of downloads they will ever receive. The work, carried out by Phil Davis, an independent researcher and publishing consultant based in Ithaca, New York, ...
said, medicine still has a very short half-life; in fact it is one of the areas where knowledge changes the fastest. One of the slowest is mathematics, because when you prove something in mathematics it is pretty much a settled matter unless someone finds an error in one of your proofs....
Alternatives to Half-Life Portal - Puzzle-solving with physics-based mechanics. BioShock - Atmospheric shooter with a rich narrative. Deus Ex - RPG and FPS hybrid with choice-driven gameplay. Metro 2033 - Survival horror in post-apocalyptic Russia. ...
half-life (haf'līf), The period in which the radioactivity or number of atoms of a radioactive substance decreases by half; similarly applied to any substance, such as a drug in serum, whose quantity decreases exponentially with time. Compare:half-time. ...