EXERCISE 22

In a nuclear reactor give the function of the

(i) moderator

${{}_{92}\mathrm{P}}^{236}\to {{}_{a}Q}^{141}+{{}_{36}R}^b+3_0{n}^1$ what are the values of $\text{'}a\text{'} \& \text{'}b\text{'}$

In a nuclear reactor give the function of the

(ii) control rods

${{}_{92}\mathrm{P}}^{236}\to {{}_{a}Q}^{141}+{{}_{36}R}^b+3_0{n}^1$ what are the values of $\text{'}a\text{'} \& \text{'}b\text{'}$

In a nuclear reactor give the function of the

(iv) heavy water. In a hypothetical fission reaction

${{}_{92}\mathrm{P}}^{236}\to {{}_{a}Q}^{141}+{{}_{36}R}^b+3_0{n}^1$ what are the values of $\text{'}a\text{'} \& \text{'}b\text{'}$

A radioactive sample $S_1$ having an activity of $5\mu \mathrm{Ci}$ has twice the number of nuclei as another sample $S_2$ which has an activity of $10\mu \mathrm{Ci}$. The half-lives of $S_1$ and $S_2$ can be

A radioactive nucleus $A$ finally transforms into a stable nucleus $B$. Then $A$ and $B$ can be.

Starting with a sample of pure ${ }^{66} \mathrm{Cu}, \frac{7}{8}$ of it decays into Zn in 15 min. The corresponding half-life is

The binding energy per nucleon for the parent nucleus is $E_1$and that for the daughter nucleus is $E_2$. Then 

 The speed of the daughter nucleus is