Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    2
    ReputationRep:
    Name:  Screenshot_2016-02-21-13-13-41.jpg
Views: 47
Size:  254.5 KB
    Attachment 506277506279

    I need help with this question. I have also attached my version of how i did it but am not sure if this is correct.
    Attached Images
     
    Offline

    15
    ReputationRep:
    Plot the log of the thickness against the log of th count rate. Then think about how this affects the equation of the curve given.
    • TSR Support Team
    Online

    21
    ReputationRep:
    TSR Support Team
    (Original post by Jyashi)
    Name:  Screenshot_2016-02-21-13-13-41.jpg
Views: 47
Size:  254.5 KB
    Attachment 506277506279

    I need help with this question. I have also attached my version of how i did it but am not sure if this is correct.
    It's asking you to solve it graphically so I'm not entirely sure why you've gone straight for substituting numbers in (if that's what you've done). My first recommendation would be to turn your exponential equation into y=mx+c form by taking logs of both sides.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by Plagioclase)
    It's asking you to solve it graphically so I'm not entirely sure why you've gone straight for substituting numbers in (if that's what you've done). My first recommendation would be to turn your exponential equation into y=mx+c form by taking logs of both sides.
    By this do you mean take the Log(Thickness) & Log(Counts / Min) or do you mean log(r)=R_0e^bx?
    • TSR Support Team
    Online

    21
    ReputationRep:
    TSR Support Team
    (Original post by Jyashi)
    By this do you mean take the Log(Thickness) & Log(Counts / Min) or do you mean log(r)=R_0e^bx?
    R=R_0 e^{\beta x}
    \ln{R}=ln{R_0}+\beta x

    Does this help?
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by Plagioclase)
    R=R_0 e^{\beta x}
    \ln{R}=ln{R_0}+\beta x

    Does this help?
    Yes it does. I managed to get to this as well and relate it to the y=mx + c equation. I got the m or beta out as -1.029x10^-3 does this seem about right?
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: February 21, 2016
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.