half life worksheet answer key 3. What percent of a sample As-81 remains un-decayed after 43.2 seconds

Question

Physics

Tara Lynch

6 August, 21:02

half life worksheet answer key 3. What percent of a sample As-81 remains un-decayed after 43.2 seconds

+3

Answers (1)

Know the Answer?

Daniella Lutz · Answer 1

The final mass after decay can be obtained by using under given relation:

half life period of As-81 = 33 seconds

mf = mi x (1/2^n)

= 100 x (1/2^ (43.2/33))

= 40.4 %