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It assesses knowledge in subjects relevant to the candidate’s chosen course of study.","tags","utme jamb joint admission matriculation board unified tertiary matriculation examination nigeria africa","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",5,"createdOn",1755987353430,"updatedOn","questionsCount",29915,"courseCount",20,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"hzKkCNQxrtnQxJFQgmCTsvPEBb307W","q","The count rate of a radioactive material is 800 count/min. If the half-life of the material is 4 days, what would the count rate be in 16 days later","ans",[414],2,"2003","course","physics","exp","116 days = 4 half - lives
\nThus, after 4 half lives the fraction left of any radioactive materials is given by (¹/₂)⁴ = ¹/₁₆
\n∴ Count rate / amount left = ¹/₁₆ x ⁸⁰⁰/₁
\n= 50 count / min","opts",[422,423,424,425],"200 count / min","100 count / min","50 count / min","25 count / min",34,"34","initComment","initReply","actionData","errors"]

JAMB - Physics (2003 - No. 34)

Explanation

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