Hey there! Sign in to join this conversationNew here? Join for free

Can someone tell me what 900 to the power of -6 is please? Watch

    • Thread Starter
    Offline

    1
    ReputationRep:
    00000
    Offline

    13
    ReputationRep:
    900x10^-6?

    =0.0009.

    Posted from TSR Mobile
    Offline

    16
    ReputationRep:
    900-6
    = 1 ÷ 9006
    = 1 ÷ ( 5.31 x 1017 ) or 1 ÷ 531,441,000,000,000,000
    = 0.000 000 000 000 000 001 881 676

    I think you may have got something wrong somewhere.
    Offline

    20
    ReputationRep:
    I would suggest using a calculator if there's no reason not to.
    • Study Helper
    Online

    21
    ReputationRep:
    Study Helper
    (Original post by mathskillsme)
    I need to do a formula to work out slope and deflection on a beam.

    The value 'I' has been given to us but not in standard form.

    It says 900 to the power of -6.

    I can't for the life of me get this right the numbers aren't working!

    Thanks in advance.
    Is it 900 to the power of -6 ?

    or have you missed out x10

    in which case the question should be: what is 900x10-6 ?

    The latter is a standard physics and engineering notation rounding the power to the nearest multiple of 3.

    The answers will be very different.
    Offline

    13
    ReputationRep:
    I assume I = second moment of area, so it assume I = 900x10^-6 mm^4

    Posted from TSR Mobile
    • Thread Starter
    Offline

    1
    ReputationRep:
    Hi, thanks
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by yennibubs)
    I assume I = second moment of area, so it assume I = 900x10^-6 mm^4

    Posted from TSR Mobile
    Yes you are absolutely correct, this is the fo
    Offline

    20
    ReputationRep:
    (Original post by mathskillsme)
    Hi, thanks for all the replies!

    I originally had 0.0009 m but it isn't working in my calculations.

    The only bit I have to do is the first sentence of the problem : It's supposed to say 50Kn load instead of 40Kn.

    Thanks!
    There's where you went wrong. It says 900 x 10-6 not 900-6​.
    Offline

    13
    ReputationRep:
    (Original post by mathskillsme)
    Yes you are absolutely correct, this is the formula I need to use.



    I don't understand why E is 200 Gn/m2. I think this could be Kn and the sheet is wrong?

    I just can't put it in the equation and get a decent answer.
    No no. The modulus of elasticity is 200GPa so the sheet is right.
    Sorry not exactly in the best position to help you fully because I'm out and about right now. Not very helpful :erm:

    Posted from TSR Mobile
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by yennibubs)
    No no. The modulus of elasticity is 200GPa so the sheet is right.
    Sorry not exactly in the best position to help you fully because I'm out and about right now. Not very helpful :erm:

    Posted from TSR Mobile
    Thanks, I believe 1 Gpa is equal to 1 Kn/mm(2) though?

    Not 1 Giga Newton?

    Really confused!
    Offline

    13
    ReputationRep:
    (Original post by mathskillsme)
    Thanks, I believe 1 Gpa is equal to 1 Kn/mm(2) though?

    Not 1 Giga Newton?

    Really confused!
    1Pa = 1N/m2
    1GPa = 1GN/m2 = 1kN/mm2
    200GPa = 200GN/m2

    Edit: sorry made a few edits. Hope you manage to see the right one haha

    Posted from TSR Mobile
 
 
 
  • 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
    Brexit voters: Do you stand by your vote?
    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
  • 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.