garsemi55 garsemi55

02-05-2017
Physics

contestada

If the half- life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds ?

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egenriether egenriether

02-05-2017

after 30 seconds half is left. After 30 more seconds, half of that much will be left (25%) or 1/4 of the original amount

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