Half Life Simple Definition
The time required for half of something to undergo a process.
Half life simple definition. Copyright harpercollins publishers. Half life is a term used to describe a future date when half of the total principal of a mortgage backed security mbs or another form of debt or bond will be paid off. The term is also used more generally to characterize any type of exponential or non exponential decay.
While an estimate can be. Half life symbol t 1 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. For example the medical sciences refer to the.
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 or removed by both elimination and decay effective half life collins english dictionary. The half life of a substance does not equal half of its full duration of radioactivity. Half life in radioactivity the interval of time required for one half of the atomic nuclei of a radioactive sample to decay change spontaneously into other nuclear species by emitting particles and energy or equivalently the time interval required for the number of disintegrations per second of a radioactive material to decrease by one half.
Definition for half life the time it takes for one half of the atoms of an unstable element or nuclide to decay radioactively into another element or nuclide for a given reaction the half life t1 2 of a reactant is the time required for its concentration to reach a value that is the arithmetic mean of its initial and final equilibrium value. The time required for half the amount of a substance such as a drug radioactive tracer or pesticide in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes. Hăf līf the average time needed for half the nuclei in a sample of a radioactive substance to undergo radioactive decay.
The time required for half of the atoms of a radioactive substance to become disintegrated. Half life is the time it takes for half of the unstable nuclei in a sample to decay or for the activity of the sample to halve or for the count rate to halve.
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