Half-life-alyx-trnt.rar -

Nt=N0(12)tT1/2cap N sub t equals cap N sub 0 open paren one-half close paren raised to the the fraction with numerator t and denominator cap T sub 1 / 2 end-sub end-fraction power Determining Half-Life from a Graph

: Draw a horizontal line from this half-value to the curve, then a vertical line down to the time axis (x-axis). Half-Life-Alyx-TRNT.rar

: Activity is measured in Becquerels (Bq) , representing one decay per second. The Mathematical Formula The relationship between the decay constant ( ) and the half-life is defined by the following equation: Nt=N0(12)tT1/2cap N sub t equals cap N sub

National 5 Physics | Radiation | Half-life | WORKED EXAMPLES : T1/2=ln(2)λ≈0

) of a radioactive isotope is the time required for half of the unstable nuclei in a sample to undergo radioactive decay. :

T1/2=ln(2)λ≈0.693λcap T sub 1 / 2 end-sub equals the fraction with numerator l n 2 and denominator lambda end-fraction is approximately equal to the fraction with numerator 0.693 and denominator lambda end-fraction For general calculations of the remaining mass ( Ntcap N sub t ) after a certain time (