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

1. 00000
2. 900x10^-6?

=0.0009.

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3. 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.
4. I would suggest using a calculator if there's no reason not to.
5. (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!

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

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7. Hi, thanks
8. (Original post by yennibubs)
I assume I = second moment of area, so it assume I = 900x10^-6 mm^4

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Yes you are absolutely correct, this is the fo
9. (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​.
10. (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.

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11. (Original post by yennibubs)
No no. The modulus of elasticity is 200GPa so the sheet is right.

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

Not 1 Giga Newton?

Really confused!
12. (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

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Updated: January 10, 2015
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