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physics!

  • 15-06-2008 3:30pm
    #1
    cartman444
    Closed Accounts Posts: 125 ✭✭


    hey im just wondering for the experiments is there any way of knowing which thing goes on the x-axis and y-axis or do you just have to learn all the graphs off???:)


Comments

  • #2
    The LeavyC
    Closed Accounts Posts: 50 ✭✭The LeavyC


    cartman444 wrote: »
    hey im just wondering for the experiments is there any way of knowing which thing goes on the x-axis and y-axis or do you just have to learn all the graphs off???:)


    well it doesn't actually matter unless you're asked to find the slope. in which case, if you know the formula you can tell which goes on y and which goes on the x. (whichever is on top in the formula is going to be on the Y axis, and whichever is on the bottom is the X axis.


  • #3
    cartman444
    Closed Accounts Posts: 125 ✭✭cartman444


    The LeavyC wrote: »
    well it doesn't actually matter unless you're asked to find the slope. in which case, if you know the formula you can tell which goes on y and which goes on the x. (whichever is on top in the formula is going to be on the Y axis, and whichever is on the bottom is the X axis.

    cheers!


  • #4
    shanedownfall
    Registered Users, Registered Users 2 Posts: 81 ✭✭shanedownfall


    My chem teacher give a good explanation of this. Put what ever you are controlling on the x-axis. ie. If you're taking a reading of something every 5 minutes you are controlling the time... Just in case the other way doesn't work ;)


  • #5
    salman85
    Closed Accounts Posts: 135 ✭✭salman85


    shanedownfall wrote: »
    My chem teacher give a good explanation of this. Put what ever you are controlling on the x-axis. ie. If you're taking a reading of something every 5 minutes you are controlling the time... Just in case the other way doesn't work ;)

    + 0.5

    what ever you control goes on X what ever changes as a result goes on Y

    because f(x)(which is y) is a function of X so if X changes y changes as a result

    2x -4 = 0

    if x is 2 f(x) = 0
    if x is 3 then f(x) = 2


  • #6
    ian.f
    Registered Users, Registered Users 2 Posts: 135 ✭✭ian.f


    Dependent on the y axis


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  • #7
    Fringe
    Registered Users, Registered Users 2 Posts: 1,082 ✭✭✭Fringe


    Would you lose marks though if you got them mixed up and it didn't specify what axis to put it on?


  • #8
    Peleus
    Registered Users, Registered Users 2 Posts: 784 ✭✭✭Peleus


    only if the axes are important. For a directly proportional graph no, you wouldn't lose marks because its the same shape. But for the I/V graphs you might. But for the I/V graphs current is always on the Y.


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