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

    1
    ReputationRep:
    Hello,

    I need help with on getting the idea for the following question found in 4b AQA PHYA 2A 2013 (Astrophysics):

    4b) Ursa Minor also contains the galaxy NGC 6251. Measurements indicate that the lightfrom the galaxy has a red shift, z, of 0. 025 and that the galaxy is 340 million light yearsfrom Earth.

    4bi) Use these data to calculate a value for the Hubble constant.

    TL;DR In the mark scheme, where did the value 3x10^5 come from?

    Kind regards,
 
 
 
  • 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 like to hibernate through the winter months?
  • 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

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