Half- Lewende Sakrekenaar
Radioaktiewe verval: vind die oorblywende bedrag, verstryk tyd of half-lewe, met 'n verval kurwe.
Resultate werk op soos jy tik.
Aangaande hierdie sakrekenaar
The half-life is the time it takes for half of a radioactive sample to decay, and it sets the pace of the whole process through N = N₀ × (½)^(t / t½), where N₀ is the starting amount, t is the elapsed time and t½ is the half-life. After one half-life half the material remains, after two a quarter, after three an eighth, and so on — the amount never quite reaches zero but halves with every t½ that passes. Choose what to solve for: the amount left after a given time, the time needed to fall to a given amount, or the half-life itself inferred from a measured decay.
As a worked example, carbon-14 has a half-life of 5,730 years, so a sample that starts with 100 units of C-14 falls to 100 × (½)^(2000 / 5730) ≈ 78.5 units after 2,000 years. The calculator also reports the decay constant λ = ln2 / t½ ≈ 0.693 / t½ (the probability a given atom decays per unit time) and the mean lifetime τ = 1 / λ = t½ / ln2, which is about 1.44 half-lives — the average time an individual atom survives — and plots the decay curve.
Because the maths is scale-free, the time and the half-life only need to share the same unit — years, days, seconds or hours — and the initial and remaining amounts can be in grams, atom counts, becquerels or any consistent measure. This makes the tool equally at home with radiocarbon and radiometric dating, medical isotope dosing, nuclear-waste decay planning and any first-order exponential decay, including some drug-elimination and discharge problems that follow the same half-life mathematics.
Dikwels gevra vrae
Wat is die half-lewe verval formule?
Die bedrag links na tyd t is N = N0 × (1⁄2)^ Solomont/t1⁄2). Na 'n half-lewe half oorbly, na twee' n kwart, na drie 'n agtste, ensovoorts.
Wat is die agteruitgang wat voortdurend en lewenslank beteken?
The decay constant is λ = ln2 / t½ ≈ 0.693 / t½, the probability of decay per unit time. The mean lifetime τ = 1 / λ = t½ / ln2 is the average time an atom survives — about 1.44 half-lives.
Kan ek die half-lewe vind van twee metings?
Ja. Stel "solve vir" tot half- lewe en gaan die aanvanklike en oorblywende bedrae in plus die versteke tyd; die gereedskap los t1⁄2 op = t × ln2 / ln0/N).
Hoe hou koolstof-14 afsprake verband met die half-lewe?
Koolstof-14 verval met 'n half-lewe van 5 730 jaar, so meet hoeveel C-14 is oor in' n een keer-lewende monster datums dit. Van 100 eenhede, ongeveer 78,5 oor na 2 000 jaar, en ongeveer die helfte na 5 730 Kinshasa die basis van radiokarbonien datering.
Watter eenhede gebruik die tyd en die halwe lewe?
Enige eenheid, solank as die versteke tyd en die half-lewe deel dit. Invoer beide in jare, of beide in sekondes; die verhouding t / t1⁄2 is al wat saak, en die resultate kom terug in daardie selfde eenheid.
Hoeveel is oor na 'n paar half-ives?
Multiply by one-half for each half-life: 50% after one, 25% after two, 12.5% after three, 6.25% after four. After ten half-lives under 0.1% remains, which is why "about ten half-lives" is a common rule for effectively gone.
Hang die helfte van die lewe af van hoeveel materiaal ek begin?
Nee. Dit is 'n vaste eiendom van die Isope, onafhanklik van monster grootte, temperatuur of chemiese staat. Of jy begin met 'n gram of' n ton, helfte verval in presies een halwe lewe ← wat dit so 'n betroubare horlosie maak.
API ← gebruik hierdie sakrekenaar van kode
Bel hierdie sakrekenaar as 'n vry JSON-punt takies wat nodig is. Stuur die veldwaardes hieronder as navraag parameters of JSON. Enigiets wat jy weglaat gebruik dieselfde verstek hierdie bladsy is vooraf gevul met; 'n onbekende parameter is 'n 400, nooit' n stil nul. Lees die volle API docs →
Einde punt:
GET https://calculator.free/api/v1/half-life/curl
curl "https://calculator.free/api/v1/half-life/?solve=remaining&initial=100&half_life=5730&time=2000"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/half-life/?" + new URLSearchParams({
"solve": "remaining",
"initial": "100",
"half_life": "5730",
"time": "2000"
}));
const data = await r.json();
console.log(data.results);Die resultate is skattings van algemene leiding, nie net finansiële, mediese of belastingvoorligting nie.