The mean lives of a radioactive mat...

The mean lives of a radioactive material for `alpha` and `beta ` radiations are 1620 and 520 years respectively . The material decays simultaneously for `alpha` and `beta` radiations. The time after which one fourth of the material remains undecayed in -

540 years

324 year

720 year

840 years

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

RADIOACTIVITY & NUCLEAR PHYSICS
MOTION|Exercise Exercise-2|24 Videos
RADIOACTIVITY & NUCLEAR PHYSICS
MOTION|Exercise Exercise-3|81 Videos
RADIOACTIVITY & NUCLEAR PHYSICS
MOTION|Exercise Questions For Practice|12 Videos
PROJECTILE MOTION
MOTION|Exercise EXERCISE-3 (SECTION-B)|8 Videos
RAY OPTICS
MOTION|Exercise Exercise-4|38 Videos

Similar Questions

Explore conceptually related problems

A radioactive material has mean lives of 1620 yr and 520 yr for alphaandbeta-"emission" , respectively. The material decays by simultaneous alphaandbeta-"emissions . The time in which 1/4th of the material remains intact is

A radioactive material has mean lives of 1620 years and 660 years for alpha and beta emissions respectively the material decays by simultaneous alpha and beta emission. The time in which (1)/(4)th of the material remains intact is-

A radioactive material decays by simultaneous emission of two particles of half lives 1620 and 810 years. The time (in years) after which one-fourth of the material remains, is

A radioactive material has a half life of 600 years and 300 years for alpha and beta emissions respectively. The material decays by simultaneous alpha and beta emissions respectively . The material decays by simultaneously alpha and beta emissions . What is time in which 3/4 th of the material will decay ?

Half lives for alpha and beta emission of a radioacative materila are 16 years and 48 years respectively. When material decays giving alpha and beta emission simultaneously, time in which 3//4^(th) material decays is .

If the half lives of a radioactive element for alpha and beta decay are 4 year and 12 years respectively, then the percentage of the element that remains after 12 year will be

The half lives of a radioactive sample are 30 years and 60 years from alpha - emission and beta - emission respectively If the sample decays both by alpha-emission and beta -emission simultaneously, the time after which, only one-fourth of the sample remain is

After a time equal to four half lives, the amount of radioactive material remaining undecayed is-

A radiacative moterial docays by simulataneous emission of two particle from the with respective half - lives 1620 and 810 year . The time , in year , after which one - fourth of the material remins is

MOTION-RADIOACTIVITY & NUCLEAR PHYSICS-Exercise -1

What percentage of the atoms in a sample will remain undecayed...
Text Solution
|
In a RA element the fraction of initiated amount remaining after...
Text Solution
|
The mean lives of a radioactive material for alpha and beta rad...
Text Solution
|
Activity of a radioactive substance is R(1) at time t(1) and R(2) ...
Text Solution
|
The activity of a radioactive sample drops fo 1//32 of its initi...
Text Solution
|
A radioactive material emits 20 beta - perticles per sec . At 10...
Text Solution
|
We get N(1) and N(2) beta- perticles per second from two specimen...
Text Solution
|
There are two radio nuceli A and B. A is an alpha emitter and B a beta...
Text Solution
|
The number of alpha and beta- emitted during the radioactive decay cha...
Text Solution
|
When .90 Th^228 transforms to .83 Bi^212, then the number of the emitt...
Text Solution
|
A radioactive nucleus undergoes a series of decay according to the sch...
Text Solution
|
The particles not emitted by radioactive susbstace are:
Text Solution
|
gamma- rays are produced ………. , alpha or beta- decay
Text Solution
|
The particle emitted in the nuclear reaction .(Z) X^(A) = .(Z+1)...
Text Solution
|
By neutrino hypothesis which conservation law for beta- decay c...
Text Solution
|
During a negative beta decay,
Text Solution
|
In a given magnetic field for the particle less of same velocit...
Text Solution
|
A nucleus with mass number m and atomic number n, emits one al...
Text Solution
|
The intensity of gamma- from a source (I(0)) reduces to I(0)//8 af...
Text Solution
|
The inteisity of gamma radiation from a given source is I(0) . ...
Text Solution
|