# How do I find this? 60x10-6 = ?

1. Nov 26, 2012

### Vancurt

I don't understand where it comes from.

Say for example 60x10-6

or sixty times 10 to the power of mines six.

How do I find the last part?

2. Nov 26, 2012

### Staff: Mentor

Re: How do I find this?

1x10^-6 = 0.000001

10x10^-6 = 0.000010

60x10^-6 = _________

Does that help?

3. Nov 27, 2012

### CWatters

60x10-6 = 1 / (60x106)

106 = 10 * 10 * 10 * 10 * 10 * 10 = 1,000,000

10-6 = 1 / (10 * 10 * 10 * 10 * 10 * 10) = 1/1,000,000

Try..

1/(3-2) = ?

4. Nov 27, 2012

### Michael Redei

No. In fact, 60 × 10-6 = 60 / 106.

5. Nov 28, 2012

### Vancurt

I know what it means but what I don't understand is where it comes from I mean like when do I know when to use it?

For example:

150mm dia
Elasticity 200gpa

But I wrote it down as 150x10^-3 and 200x10^9

I could of left it as 150 and 200 but I changed it to ^ instead, why did I do it and how did I know that it was ^-3 and ^9?

Last edited: Nov 28, 2012
6. Nov 28, 2012

### Staff: Mentor

The prefixes are part of the definition of the International System of units ("SI" units):

http://physics.nist.gov/cuu/Units/prefixes.html

And note that "Giga" (10^12) uses a capital "G", not a lowercase one as you have written.