The primary reason that scientists use half-lives instead of decay constants is because half-lives have a more intuitive immediate meaning: if a scientist collects 20 kg of a radioactive isotope with a half-life of 30 min, and she leaves her lab to meet with a grad student for 30 minutes, when she comes back she will have 10 kg of the isotope

Half-life = 0.693/Ke ---- [h/(half) = 0.693 / (frcn/h)] 0.693 is the natural logarithm of 2. Thus, half-life is an arbitrary measure of drug elimination that is useful for humans, but not easy to use in complex formulae. Therefore, many tables contain both, but most formulae require one to use Ke. You should be able to do this as well as to
For half life the best way to go about it is to follow the general half life equation: y=x(.5)^(t/n) Where n is the half life time, in this case 6 hours and t is the time elapsed. This equation can be better understood by understanding its mechanism: half of the initial mass will remain when you raise .5 to the power of 1, which means that when t=n, the power will be 1 and half the initial
So far we have considered a dosing interval equal to the half -life of the drug. Fig. 2 shows the plasma concentration time profile for once daily intravenous bolus dosing of drugs with half-lives of 6 hours, 24 hours and 96 hours (0.25, 1 and 4 times the dosing interval of 24 hours). For the drug with a half-life of 6 hours (characteristic of
Expert Answer. If the material half-life of 24 hours, how long do you have to wait until the amount of radioisotope is 1/4 its original amount? O A 12 hours OB.72 hours OC 122 hours O 0.24 hours DE 48 hours A sealed box is completely evacuated (perfect vacuum), then 1,000,000 radioactive atoms are added. Their half-life is 2 days.
Originally posted by Pinhead: it depends of so many factors if you role play it, this game could take 30 hours. If you run everywhere you can beat it the first time in maybe 12 hours. If you are an idiot that likes to rape the game passing though it by speedrunning and using bunnyhop and glitches, it can take just 30 minutes.
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how many hours is half life 2