World's only instant tutoring platform
dropdown-logo
Become a tutorPartnershipsAbout usStudent loginTutor login
About us
Login
App StorePlay Store
Get 2 FREE Instant-Explanations on Filo with code FILOAPP
Activity of a radioactive substance decreases from 8000 {~Bq}
Question
Medium
Timing Icon

Solving time: 3 mins

Activity of a radioactive substance decreases from to in 9 days. What is the half-life and average life of the radioactive substance?

Views

Views: 5,971 students

Book

Book:

Optics And Modern Physics (DC Pandey)

tutor 0tutor 1tutor 2
Found 7 tutors discussing this question
Evelyn Discussed
Activity of a radioactive substance decreases from to in 9 days. What is the half-life and average life of the radioactive substance?
9 mins ago
Discuss this question LIVE
9 mins ago

Text SolutionText solutionverified iconVerified

number of half-lives These half-lives are equivalent to 9 days. Hence, one half-life is 3 days.
Was this solution helpful?
75
Share
Report
One destination for complete JEE/NEET preparation
One destination to cover all your homework and assignment needs
Learn Practice Revision Succeed
Instant 1:1 help, 24x7
Instant 1:1 help, 24x7
60, 000+ Expert tutors
60, 000+ Expert tutors
Textbook solutions
Textbook solutions
Big idea maths, McGraw-Hill Education etc
Big idea maths, McGraw-Hill Education etc
Essay review
Essay review
Get expert feedback on your essay
Get expert feedback on your essay
Schedule classes
Schedule classes
High dosage tutoring from Dedicated 3 experts
High dosage tutoring from Dedicated 3 experts
Trusted by 4 million+ students

Practice questions from Optics And Modern Physics (DC Pandey)

Question 1
Hard
Views

Views: 5,196

A stable nuclei is formed from two radioactive nuclei and with decay constant of and respectively. Initially, the number of nuclei of is and that of is zero. Nuclei are produced at a constant rate of . Find the number of the nuclei of after time .
Topic

Topic:

Nuclei

Book

Book:

Optics And Modern Physics (DC Pandey)

View solution

Question 2
Medium
Views

Views: 5,400

Binding energy per nucleon versus mass number curve for nuclei is shown in figure. W, X, Y and Z are four nuclei indicated on the curve. The process that would release energy is
Topic

Topic:

Nuclei

Book

Book:

Optics And Modern Physics (DC Pandey)

View 7 solutions

Question 3
Medium
Views

Views: 5,358

A radioactive sample consists of two distinct species having equal number of atoms initially. The mean life of one species is and that of the other is . The decay products in both cases are stable. A plot is made of the total number of radioactive nuclei as a function of time. Which of the following figure best represents the form of this plot?
Topic

Topic:

Nuclei

Book

Book:

Optics And Modern Physics (DC Pandey)

View solution

Question 4
Hard
Views

Views: 6,078

In a nuclear reactor undergoes fission liberating of energy. The reactor has a efficiency and produces power. If the reactor is to function for , find the total mass of uranium required.
Topic

Topic:

Nuclei

Book

Book:

Optics And Modern Physics (DC Pandey)

View solution

View more
filo Logo

Practice more questions from Nuclei

Question 1
Medium
Views

Views: 5,954

(a) Calculate the energy released if emits an particle. (b) Calculate the energy to be supplied to if two protons and two neutrons are to be emitted one by one. The atomic masses are :
Topic

Topic:

Nuclei

Book

Book:

Physics Galaxy Optics and Modern Physics Vol 4 (Ashish Arora)

View solution

Question 2
Medium
Views

Views: 5,725

For thorium at the end of some radioactive disintegration we obtain an isotope of lead with and , then the number of emitted particles are
Topic

Topic:

Nuclei

View 2 solutions

Question 3
Hard
Views

Views: 5,460

A sample has two isotopes and having masses and respectively. A is radioactive and is stable. A decays to by emitting particles. The half life of is 2 hrs. The mass of total sample after 4 hours is nearly . Find
Topic

Topic:

Nuclei

View 3 solutions

Question 4
Hard
Views

Views: 5,511

Let be the mass of a proton, the mass of a neutron, the mass of a Ne nucleus the mass of a Ca nucleus. Then :
Topic

Topic:

Nuclei

View 10 solutions

View more

Practice questions on similar concepts asked by Filo students

Question 1
Views

Views: 5,504

Amplitude of waves observed by two light sources of same wave length are and and have a phase difference of between them. Then minimum intensity of light will be proportional to :
  1. 0
Topic

Topic:

Optics

View solution

Question 2
Views

Views: 5,576

(i) Define the term conductivity of a metallic wire. Write its SI unit. (ii) Using the concept of free electrons in a conductor, derive the expression for the conductivity of a wire in terms of number density and relaxation time. Hence, obtain the relation between current density and the applied electric field
Topic

Topic:

Electrostats

View 6 solutions

Question 3
Views

Views: 5,903

(f) At what speed does its total E increase by 100%? (e) At what speed does its KE increase by 100%? (c) total energy. (d) At what speed does its momentum increase by 100%? (b) kinetic energy, and (a) momentum, 1.09. For this electron, calculate the MKS units). Speeds should be left in terms of c. 6 For an electron m = 0.511 MeV/c traveling at a speed of 0.4c, the relativistic factor is = In Questions 5, 6, be sure to stay in the unit system that uses eV, keV, or MeV (do not convert to
Topic

Topic:

Physics

View solution

Question 4
Views

Views: 5,266

An electron is rotating around an infinite positive linear charge in a circle of radius , if the linear charge density is , then the velocity of electron in will be
Topic

Topic:

Electrostats

View 10 solutions

View more
Doubt Icon Doubt Icon

Stuck on the question or explanation?

Connect with our Physics tutors online and get step by step solution of this question.

231 students are taking LIVE classes

Related books for questions on Nuclei

next icon
next icon
Question Text
Activity of a radioactive substance decreases from to in 9 days. What is the half-life and average life of the radioactive substance?
TopicNuclei
SubjectPhysics
ClassClass 12
Answer TypeText solution:1
Upvotes75