You are Here: Home

# unit conversions watch

1. Example 5: 15 kg m-3 = ? mg mL-1 (Remember: 1 mL = 1 cm3)

Numerator:
15kg/ m3 x 1000g/ 1 kg x 1000mg/ 1g = 1.5 x 107mg/ m3

Denominator:
1.5 x 107mg/ m3 x 13 m3/ 1003 cm3 x 1cm3/ 1mL = 15 mg mL-1

Why do we not cube the last conversion factor? Is it because mL is a 3 dimensional measurement or something?
2. cm is a unit of length, it has to be cubed to make it a unit of volume. mL is a unit of volume, so in a way it is already cubed (its unit is length cubed).
3. (Original post by Borek)
cm is a unit of length, it has to be cubed to make it a unit of volume. mL is a unit of volume, so in a way it is already cubed (its unit is length cubed).
Thanks

I just wanted to confirm

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 9, 2013
Today on TSR

### University open days

Wed, 21 Nov '18
• Buckinghamshire New University
Wed, 21 Nov '18
• Heriot-Watt University