Question 140(ii)Consider a quantity of a radioactive substance. The fr

1.	Question 140(ii)Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3−t.After how many half-lives will the fraction be 1243 of the original?
Answer» Question 140(ii) Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression $3^{- t}$ . After how many half-lives will the fraction be $\frac{1}{243}$ of the original?

Question 140(ii)Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3−t.After how many half-lives will the fraction be 1243 of the original?

Answer»

Question 140(ii)

Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression $3^{- t}$ .

After how many half-lives will the fraction be $\frac{1}{243}$ of the original?

Discussion

No Comment Found

Related InterviewSolutions

The dipole moment of KCl is 3.336×10−29 Coulomb meters which indicates that it is a highly polar molecule. The interionic distance between K+ and Cl− in this molecule is 2.6×10−10 m. The percentage ionic character of KCl molecule, if there were opposite charges of one fundamental unit located at each nucleus is:
on heating with concentrated sulphuric acid, sucrose givesOption:a) CO and CO2b) C, CO2 and SO2c) CO, CO2 and SO2d) C and H2Oe) CO2, SO2 and H2O
Why CH2Cl2 is Polar molecular solid
Which among the following is/are ore/ores of iron?
how many spectral lines r seen for hydrogen atom when e jumps from n2= 5 to n1=1 in visible region
Explain, why electrolysis is an example of redox reaction?
A solution of CuSO4 was kept in an iron pot. After a few days, the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.
Which element from the following has the highest ionisation energy ? (a) P, Na, Cl (b) F, O, Ne (c) Ne, He, Ar Explain your choice.
How many groups and periods are there in the modern periodic table?
Under what conditions does ethane get converted to(a) ethyl alcohol(b) acetic acid

Question 140(ii)Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3−t.After how many half-lives will the fraction be 1243 of the original?

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment