MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details
Get extra R 560 off
USE CODE: MOB20

				   Is it correct to define mean life(average life) the time at which no of particles will reduce to 1/e of their initial values

No/e = No e^(-lambda*t)
-1= - lambda *t
t(mean) = 1/ lambda

or the sum of life of all the particles present divided by total no of particles
derivation using intergration..

which is the correct answer?(cbse 2010)

6 years ago

Share

Answers : (1)

										

no we cant define mean life in such a wa.The definition that You gave is the definition of Decay constant. If u find my answer useful the please approve the answer.

6 years ago

Post Your Answer

Other Related Questions on Modern Physics

A Ball is thrown verticall upward with a velocity ‘u’ from the balloon descending with a constant velocity ‘v’. The ball will pass by the balloon after time ?
 
 
Dear Ranjeet Kumar, How can you Take Displacement of ball be “vt” . It should be “vt+1/2gt 2 . Its right Answer is 2(u+v)/g. I know the answer. But dont know how to solve.
 
Kuldeep Pal 4 months ago
 
The question needs the basic understanding of motion to solve it. considering the downward direction to be +ve and taking ground as the reference point, we have : initial velocity of ball...
 
RANJEET KUMAR 4 months ago
 
Dear Kuldeep, the velocity u of the ball must be with respect to the balloon. Then, taking the upward direction as positive we have: Initial velocity of the ball = u Constant velocity of the...
 
Raman Mishra 4 months ago
Q)km / h 2 is a unit of (a) velocity (b) speed (c) acceleration (d) distance
 
 
hi naveen km/h2.it is in the form of m/s2, so m/s2 is the unit of acceleration therefore answer is (c)acceleration
 
venkata ramana one month ago
 
naveen it is a simple question. we have to convert km/h^2 it gives m/sec^2. so m/sec^2 is the unit of acceleration.the answer is (c)
 
badugu vijaya kumar yadav one month ago
 
HI NAVVEN THESE ARE UNITS OF ACCELERATION SO CORRECT ANSWER IS C] ACCELERATION THANKS KEEP POSTING YOUR DOUBTS :}
 
SAHIL one month ago
In physics,is v-t graph possible for the above specified image??
 
 
Hii this is not possible as at same point of time it is showing two positions which is kind of impossible ,Hence it is not possible to draw v-t curve .
  img
Sourabh Singh 3 months ago
 
Quantum physics is based on probabilistic approach. We define a region where probability of finding a particle is maximum. But we cant exactly define its position and momentum. Hope you...
 
Gundeep Singh 3 months ago
 
But in quantum physics,is it possible??
 
Rahul 3 months ago
what is work energy thereom...................................?
 
 
The work-energy theorem is a generalized description of motion which states that work done by the sum of all forces acting on an object is equal to change in that object’s kinetic energy....
 
dolly bhatia one month ago
 
The work W done by the net force on a particle equals the change in the particle`s kinetic energy KE: W = Δ K E = 1 2 m v f 2 − 1 2 m v i 2 . The work-energy theorem can be derived from...
 
Sushmit Trivedi one month ago
 
For any net force acting on a particle moving along any curvilinear path, it can be demonstrated that its work equals the change in the kinetic energy of the particle by a simple derivation...
 
rahul kushwaha 3 months ago
The cieling of long hall is 25 m high What is the maximum horizontal distance that a ball thrown with a speed of 40 ms can go without hitting the ceiling of wall? Plz explain with a DIAGRAM
 
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 40*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is half...
 
Tapas Khanda 5 months ago
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 30*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is half...
 
Tapas Khanda 5 months ago
 
Diagram is not required to solve this question. You can directly use the formula to find range : R = (v^2/g)*sin2Q Maximum height reached, H = v^2*sin^2Q/2g So, 25 = 40^2*sin^2Q/(2*9.8) So,...
 
Tapas Khanda 5 months ago
What harmfull gases are produced when we burn plastics? And can we burn plastics?
 
 
I`m doing a project, can someone help me, How to reduce those toxic contents when plantic are burnt Like sulphur, nitrogen etc
 
2017 years ago
 
nitrogen gas , sulphur dioxide ,carbon monoxide , carbon dioxide. are some of the gases. well burning plastic is not good for living things. but there are many other things that are more...
 
3 days ago
View all Questions »

  • Complete Physics Course - Class 12
  • OFFERED PRICE: R 2,600
  • View Details
Get extra R 520 off
USE CODE: MOB20

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details

Get extra R 560 off
USE CODE: MOB20

More Questions On Modern Physics

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details