Physics, asked by kashishparveen4663, 1 year ago

In a given sample, at some instant, the rate of disintegration of radioactive element is 8000 disintegrations per second. At this instant, the number of undisintegrated nuclei of this element is 8*10⁷. Find the decay constant and half life of this element.[Ans: λ=10⁻⁴ s⁻¹, τ^1/2= 6390 s]

Answers

Answered by Arslankincsem
3

Give N0 a chance to be the underlying number of cores in both X1 and X2.


Give N1 a chance to be the quantity of cores in X1 and N2 be the quantity of cores in X2 now.


At that point N1 = N0 e– 10λt N2 = N0 e– λt We have to discover N1/N2.


Isolating the over two conditions we get, N1/N2 = e– 9λt


This proportion is given to be 1/e and we have to compute the time't' all things considered. e– 9λt = 1/e. => 9λt = 1, or t = 1/9λ.


This gives (D) as the right alternative.

Answered by het7426patel
0

Explanation:

Give NO a chance to be the underlying number of cores in both X1 and X2.

Give N1 a chance to be the quantity of cores in X1 and N2 be the quantity of cores in X2 now.

At that point N1 = NO e- 10λt N2 = NO e- λt We have to discover N1/N2.

Isolating the over two conditions we get, N1/N2 =

e- 9λt

This proportion is given to be 1/e and we have to compute the time't' all things considered. e- 9λt= 1/e. => 9λt=1, or t = 1/9λ.

This gives (D) as the right alternative.

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