147562 If a radioactive element having half-life of 30 min is undergoing beta decay, the fraction of radioactive element remains undecayed after $90 \mathrm{~min}$. will be

147564 A nuclear reactor delivers a power of $10^{9} \mathrm{~W}$, the amount of fuel consumed by the reactor in one hour is

147565 Calculate the energy released during the alpha decay of ${ }_{92}^{238} U=238$. Given the following data.
\({ }_{92}^{238} \mathrm{U}=238.05079 \mathrm{u},{ }_{90}^{234} \mathrm{Th}=234.04363 \mathrm{u}\)
${ }_{2}^{4} \mathrm{He}=4.00260 \mathrm{u}, 1 \mathrm{u}=931.5 \mathrm{MeV} / \mathrm{C}^{2}$.

147566 A radioactive element $A$ converts into another stable element B. Half life of $A$ is $\mathbf{1 . 5}$ hrs. After time $t$ the ratio of atoms of $A$ and $B$ is found to be $1: 8$, then $t$ in hours is-

147562 If a radioactive element having half-life of 30 min is undergoing beta decay, the fraction of radioactive element remains undecayed after $90 \mathrm{~min}$. will be

147564 A nuclear reactor delivers a power of $10^{9} \mathrm{~W}$, the amount of fuel consumed by the reactor in one hour is

147565 Calculate the energy released during the alpha decay of ${ }_{92}^{238} U=238$. Given the following data.
\({ }_{92}^{238} \mathrm{U}=238.05079 \mathrm{u},{ }_{90}^{234} \mathrm{Th}=234.04363 \mathrm{u}\)
${ }_{2}^{4} \mathrm{He}=4.00260 \mathrm{u}, 1 \mathrm{u}=931.5 \mathrm{MeV} / \mathrm{C}^{2}$.

147566 A radioactive element $A$ converts into another stable element B. Half life of $A$ is $\mathbf{1 . 5}$ hrs. After time $t$ the ratio of atoms of $A$ and $B$ is found to be $1: 8$, then $t$ in hours is-

147562 If a radioactive element having half-life of 30 min is undergoing beta decay, the fraction of radioactive element remains undecayed after $90 \mathrm{~min}$. will be

147564 A nuclear reactor delivers a power of $10^{9} \mathrm{~W}$, the amount of fuel consumed by the reactor in one hour is

147565 Calculate the energy released during the alpha decay of ${ }_{92}^{238} U=238$. Given the following data.
\({ }_{92}^{238} \mathrm{U}=238.05079 \mathrm{u},{ }_{90}^{234} \mathrm{Th}=234.04363 \mathrm{u}\)
${ }_{2}^{4} \mathrm{He}=4.00260 \mathrm{u}, 1 \mathrm{u}=931.5 \mathrm{MeV} / \mathrm{C}^{2}$.

147566 A radioactive element $A$ converts into another stable element B. Half life of $A$ is $\mathbf{1 . 5}$ hrs. After time $t$ the ratio of atoms of $A$ and $B$ is found to be $1: 8$, then $t$ in hours is-

147562 If a radioactive element having half-life of 30 min is undergoing beta decay, the fraction of radioactive element remains undecayed after $90 \mathrm{~min}$. will be

147564 A nuclear reactor delivers a power of $10^{9} \mathrm{~W}$, the amount of fuel consumed by the reactor in one hour is

147565 Calculate the energy released during the alpha decay of ${ }_{92}^{238} U=238$. Given the following data.
\({ }_{92}^{238} \mathrm{U}=238.05079 \mathrm{u},{ }_{90}^{234} \mathrm{Th}=234.04363 \mathrm{u}\)
${ }_{2}^{4} \mathrm{He}=4.00260 \mathrm{u}, 1 \mathrm{u}=931.5 \mathrm{MeV} / \mathrm{C}^{2}$.

147566 A radioactive element $A$ converts into another stable element B. Half life of $A$ is $\mathbf{1 . 5}$ hrs. After time $t$ the ratio of atoms of $A$ and $B$ is found to be $1: 8$, then $t$ in hours is-