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Biology; Chemistry; Physics: Post your doubts here!

Hi, i've been having a problem with Radioactivity and Electronics CRO. In Radioactivity there's this formula, (1/2)^n or something like that in the topical. Can anyone explain that to me? and in CRO, i had a problem in J 07 P1 Q 37. Thanks in advance :)
- Munibn
- Post #10,034
- May 11, 2013
- Forum: O-Levels / GCSEs / IGCSE

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