How to calculate Half-life of radioactive substances.

[@ntcphysics9407]

Thank you so much all for watching this lesson. More like it are coming soon.

[@huyanhle]

Hi,
Could you please help me with this following question
Radioactive materials are considered to be relatively safe when their activity has fallen below 0.1% of their initial value.
(a) How much half-lives does this take? (Answer = 10 half-lives)
(b) Plutonium-239 is a by product of nuclear reactors. Its half-life is 24 000 years. How long does the plutonium-239 have to be stored as nuclear waste before it is considered safe to handle? (Answer - 240 000 years)

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[@chernorsaidubangura8742]

Well explained

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[@ntcphysics9407]

Thanks

[@KabweMemory-z4s]

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[@KabweMemory-z4s]

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[@ntcphysics9407]

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[@ntcphysics9407]

You are welcome and thanks

[@TashimimBashir-k3s]

More scenario questions please

[@rofhiwalethabo8044]

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[@ntcphysics9407]

You are welcome

[@samuelowolabi3425]

Thank you sir

[@ntcphysics9407]

You are welcome

[@TashimimBashir-k3s]

How can we plot a half life graph

[@Betty-o9v2b]

(ii)how much of The sample decayed during this period

[@graysonngui1443]

Nice

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How did you get the 75

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[@gamingwithsmith5997]

minutes**

[@harshalakannangara7959]

😔i still dont get it

[@gamingwithsmith5997]

He made a Blunder in Copying the Log Amount 9.30

[@ntcphysics9407]

Hi,
Would you be more specific in pointing out the blander? Or maybe you did not just pay much attention to the explanation.

[@khushisrivastava5119]

1upon 2 q ayga

[@NorahNamusokwe]

Biology

[@preciousakamelu]

Please try to be straight forward

[@ntcphysics9407]

Precious where are you finding difficulties understanding?

[@TashimimBashir-k3s]

More scenario questions please

[@KabweMemory-z4s]

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