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

    6
    ReputationRep:
    How do I do these types of questions, they're so confusing. I have the mark scheme but its not helping me, can someone show me how to do the questions step by step

    Name:  Capture.PNG
Views: 22
Size:  30.2 KB
    Offline

    19
    ReputationRep:
    (Original post by alen52213)
    ...
    γ source gives mean 2010 counts/min at 0.15 m. Inc distance by factor 6 to 0.9 m, the rate dec by factor 36, as intensity ∝ 1/d^2.

    Source gives mean (integer) 56 counts/min at 0.9 m; a mean recording of 96 counts/min.

    Mean rates as 1) radioactive decay is random 2) count rate drops even for small Δt (mins).
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 6, 2017
Poll
“Yanny” or “Laurel”

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.