Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    10
    ReputationRep:
    Name:  Screen Shot 2016-02-19 at 17.10.31.png
Views: 62
Size:  72.5 KB

    how do you get to this answer?
    1. Two marks for correctanswer of 29545-30455;
    2. One mark for incorrectanswers in which candidateclearly divides measuredwidth by actual width;
    • TSR Support Team
    • Clearing and Applications Advisor
    Offline

    17
    ReputationRep:
    TSR Support Team
    Clearing and Applications Advisor
    The question relies on you physically measuring the diagram with a ruler, so if you're getting the incorrect answer with the correct working then it's because you're viewing the question at the wrong scale.

    The size of the sarcomere in the diagram is equal to the size of the real sarcomere (2.2µm) divided by the magnification.
    Rearranged, magnification = image size / real size, as it says in the mark scheme.
    Remember to use the same unit of length when doing the calculation. 1mm = 1x10^-3m, 1µm = 1x10^-6m.

    Hope that helped
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Would you rather give up salt or pepper?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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.