A radioactive sample initially contains nuclei

PHYSICS · Multi-part · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A radioactive sample initially contains

8.0\times10^{20}

nuclei. After

10\text{ d}

the number of undecayed nuclei is measured to be

5.0\times10^{20}

. (a) Calculation of

\lambda

(b) Number of nuclei after

25\text{ d}

\ln N

versus

t

with slope and intercept