Question

the half life of a radioactive substance is 6.93 hours after how many hours will 1/20 of material would be left​

Answer 1

Answer:

Time taken for degradation to 1/20 of material  = 29.45 hours

Explanation:

$T_{1/2}$ =  6.93 hours

N /No = 1 /20

N /No = $\frac{1}{2} ^{n}$

n = 4.25

$n = \frac{T}{T_{1/2} }$

T = 4.25 x 6.93 = 29.45 hours