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Hello everyone, in this video we have to find the half -life of the radioactive goo.
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We can use exponential decay formula.
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N of t is equal to n0 into e power minus lambda t.
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So where n of t is the amount of goo remaining at time t.
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N0 is the initial amount of goo.
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Lambda is the decay constant.
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T is the time elapsed.
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We are given that the initial amount of goo is 172 grams.
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So therefore n0 is equal to 172 grams.
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And after 240 minutes.
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So after 240 minutes means t is equal to 240 minutes.
00:41
And the sample has decay to 5 .375 grams.
00:46
So n of t is equal to 5 .375 grams...