Trusted by millions of Kenyans
Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

A radioactive substance has a half life of 10 hours. Calculate the percentage of the sample that remains after 25 hours.

A radioactive substance has a half life of 10 hours. Calculate the percentage of the sample that remains after 25 hours.

Answers


Moraa
N=N0(½)25/10
But percentage of the sample remaining after 25hrs is given by; [N/N0]*100
Hence [{N0(½)25/10}/N0]*100 =17.68%
Moraa orina answered the question on April 12, 2018 at 07:29

Answer Attachments

Exams With Marking Schemes

Related Questions