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# Converting to SI (Square and Cube) + Other. watch

1. A few things really that I could use clearing up.

If I was given an area of 2.5nm^2 for example to change this into m^2 would I multiply by its standard form all squared ie: x (1X10-9)^2

same for volume; if I'm given a value of 2.5mm^3 to convert into SI i'd multiply by its standard form but this time cubed ie x (1X10-3)^3

Is this correct?

Another thing does anyone know where I can learn some proportions eg if im given dimensions of an object and asked to calculate the new volume for example if each side if doubled, Im unsure what to search for; I would just like to understand the relationships so I can quickly apply them.

1 last thing is there anyway of me getting the OCR G481 2014 paper I cant seem to get hold of it anywhere Its the last paper I need to do including the legacies.

Thanks.
2. (Original post by Walex12108)
A few things really that I could use clearing up.

If I was given an area of 2.5nm^2 for example to change this into m^2 would I multiply by its standard form all squared ie: x (1X10-9)^2
Correct.

There are 1x109 nm in 1 m.

There are (1x109)2 = 1x1018 nm2 in 1 m2

To convert nm2 to m2, multiply by 1x10-18 or divide by 1x1018
(Original post by Walex12108)
A
same for volume; if I'm given a value of 2.5mm^3 to convert into SI i'd multiply by its standard form but this time cubed ie x (1X10-3)^3
1m3 comprises (1x103)3 = 1x109 mm3

To convert from mm3 to m3 multiply by 1x10-9 or divide by 1x109

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