A straight line obtained from an versus graph has slope and y-intercept

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A straight line obtained from an

\ln N

versus

t

graph has slope

-0.005\,\text{min}^{-1}

and y-intercept

12.5

. Estimate the initial number of undecayed nuclei

N_0

in the sample. (a)

8.6\times10^{5}

(b)

1.6\times10^{5}

(c)

2.7\times10^{5}

(d)

12.5