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  4. A nuclear reactor delivers a power of 109 W, the amount of fuel consumed by the reactor in one hour is

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Q. A nuclear reactor delivers a power of $10^{9} W$, the amount of fuel consumed by the reactor in one hour is

KCETKCET 2022Nuclei

Solution:

$P =\frac{ E }{ t }=\frac{ mv ^{2}}{ t } \Rightarrow 10^{9}=\frac{ m \times 9 \times 10^{16}}{3600}$
$m =4 \times 10^{-5} kg$
$m =4 \times 10^{-5} \times 10^{3} g$
$m =4 \times 10^{-2} g$
$m =0.04 \,g$