Half-Life of Strontium-90 - Solve Here!

  • Thread starter Thread starter cowboi123
  • Start date Start date
  • Tags Tags
    Half life Life
cowboi123
Messages
2
Reaction score
0

Homework Statement



The half life of strontium-90 is 28.0 years. Deduce that the decay constant of strontium-90 is 7.85 * 10^(-10) s^1.

Homework Equations



k = ln 2 over half-life in seconds

The Attempt at a Solution



dunno...please help me solve this!
 
Physics news on Phys.org
Well, express 28 years in seconds and divide log(2) by that? I don't know what else to say.
 
Thread 'Need help understanding this figure on energy levels'

Thread 'Need help understanding this figure on energy levels'

This figure is from "Introduction to Quantum Mechanics" by Griffiths (3rd edition). It is available to download. It is from page 142. I am hoping the usual people on this site will give me a hand understanding what is going on in the figure. After the equation (4.50) it says "It is customary to introduce the principal quantum number, ##n##, which simply orders the allowed energies, starting with 1 for the ground state. (see the figure)" I still don't understand the figure :( Here is...
View full post »
Thread 'Understanding how to "tack on" the time wiggle factor'

Thread 'Understanding how to "tack on" the time wiggle factor'

The last problem I posted on QM made it into advanced homework help, that is why I am putting it here. I am sorry for any hassle imposed on the moderators by myself. Part (a) is quite easy. We get $$\sigma_1 = 2\lambda, \mathbf{v}_1 = \begin{pmatrix} 0 \\ 0 \\ 1 \end{pmatrix} \sigma_2 = \lambda, \mathbf{v}_2 = \begin{pmatrix} 1/\sqrt{2} \\ 1/\sqrt{2} \\ 0 \end{pmatrix} \sigma_3 = -\lambda, \mathbf{v}_3 = \begin{pmatrix} 1/\sqrt{2} \\ -1/\sqrt{2} \\ 0 \end{pmatrix} $$ There are two ways...
View full post »

Similar threads

Estimating Half-Life of Alpha Decay: Nucleus ##^{252}_{98}Cf##
Replies
2
Views
1K
Obtaining the Half-life equation experimentally
Replies
4
Views
3K
Chemistry Calculate the half-life of the antibiotic Ofloxacin in this patient
Replies
2
Views
2K
Verifying 226-Ra Half-Life Calculation
Replies
1
Views
1K
Uncertainty in radioactive half-life experiment
Replies
1
Views
4K
Calculating the half-life of decays of Radium-224
Replies
5
Views
6K
Order of Reaction from Halflife times
Replies
2
Views
2K
MHB Half-Life of Silicon 32 - Kilani High School
Replies
7
Views
2K
Partial Half-Life of 22Na: Ec & β+ Emission
Replies
1
Views
3K
Finding the Half-Life of a Radioactive Element
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top