Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Half life of a radioactive nuclei is 5.6 days. After how many days will fraction of the

Half life of a radioactive nuclei is 5.6 days. After how many days will \frac{19}{20}th fraction of the sample decays \left [ \frac{\ln 20}{\ln 2}=4.32 \right ]
 

Option: 1

27.3


Option: 2

31.9


Option: 3

30.1

 


Option: 4

24.2


Answers (1)

best_answer

Answer - 4

N=N_{0}e^{-\lambda t}

\frac{N}{N_{0}}=e^{-\lambda t}

\frac{1}{20}=e^{-\lambda t}

\lambda t=In 20

\frac{In 2}{5.6}\times t=In 20

t=\frac{In 20}{In 2}\times 5.6

=24.2

Posted by

Deependra Verma

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET 2026 registration deadline extended to March 11 for MBBS, BDS; exam on May 3
anam-khan

NEET 2026 Registration LIVE: NTA extends MBBS, BDS application deadline to March 11; exam date
anam-khan

NEET: CBI takes over case of aspirant's death in Patna hostel; FIR registered

Latest Question