# Homework Help: Metric Prefixes.

1. Aug 28, 2010

### LMSStu2010

I've just started in Physics ADV and it's completely greek to me.
The question i'm currently stuck on is-

A human hair is approximatly 50$$\mu$$m in diameter. Express this diameter in meters.

I'm not sure how i'm suppost to work or even set up the problem.
(:
Thanks.

2. Aug 28, 2010

### rock.freak667

Do you remember your unit prefixes?

For example cent=c=10-2

milli=m=10-3

3. Aug 28, 2010

### LMSStu2010

Yes, the unit is 10-6

4. Aug 28, 2010

### rock.freak667

Right so if you diameter is 50μm and μ=10-6, then the diameter is?

5. Aug 28, 2010

### LMSStu2010

This is what i'm confused about. I'm not sure what i'm suppost to do after this.

6. Aug 28, 2010

### rock.freak667

Just replace 'μ' with '10-6' (it is that simple )

7. Aug 28, 2010

### LMSStu2010

So then it's 50x10-6?

If yes, how am I suppost to get it so that it's just in meters?

8. Aug 28, 2010

### rock.freak667

remember it is 50μm, so the 'm' will remain, giving 50x10-6m

9. Aug 28, 2010

### LMSStu2010

Oh, okay. Thanks so much.
(: