WebAug 13, 2024 · First, find the number of half-lives that have passed by dividing the time elapsed by the half-life. Then, reduce the amount of Sr -90 by half, once for each half-life. Step 2: Solve. Number of half-lives, days, mass 0 half-lives, 0 days, 5.00 mg 1 half-life, 28.1 days, 2.50 mg 2 half-lives, 56.2 days, 1.25 mg 3 half-lives, 84.3 days, 0.613 mg WebSep 2, 2015 · 1 For a certain first-order gas-hase reaction A → B + C the time required for half of an initial amount of A to decompose is 8.8 min. If the initial pressure of A is 400 mmHg, the time required to reduce the partial pressure of A to 50 mmHg is: (a) 1.1 min (b) 17.6 min (c) 26.4 min (d) 35.2 min (e) 70.4 min The correct answer is (c).
Half Lives - Purdue University
WebCalculates the effective half-life considering the metabolism of radioactive material taken into the body. Radioactive material that is ingested is eliminated from the body by metabolism. The time when the quantity becomes half by metabolism is biological half-life. Radioactive element 131I [ Physical half-life d ] [ Biological half-life d ] Web0:00 / 1:38 Computing Half-Life - Differential Equations in Action Udacity 569K subscribers Subscribe 5.3K views 10 years ago Differential Equations in Action This video is part of an online... sh-vicled-mb
31.5: Half-Life and Activity - Physics LibreTexts
WebJan 4, 2024 · How to calculate a half-life of a drug? Our drug elimination half-life calculator uses the following equation: Dosage (t) = Dosage (0) × 0.5(t/T) where: T – Half-life of a drug; t – Time that has passed since the first, original administration of the drug; Dosage (t) – Amount of drug present in a patient's body after time t; and WebFeb 20, 2024 · Why use a term like half-life rather than lifetime? The answer can be found by examining Figure \(\PageIndex{1}\), which shows how the number of radioactive nuclei in … WebSep 8, 2024 · The physical half-life of F-18 is 1.83 hours and its biological half-life is approximately 6 hours, making its effective half-life approximately 1.4 hours (7). ... You need to solve physics problems. You need to ask yourself questions and then do problems to answer those questions. After many, many years, you will have some intuition for the ... the partridge family love at first slight