Background
This question was received rather negatively by the community for its naive understanding of units of force. Put simply, it asked what would happen if you punched somebody with 172500N of force. It's off-topic for WB.SE, and it [probably] wouldn't be received too well on Physics.SE.
Proposal
Inspired by xkcd, I hope to establish some intuitive(ish) reference points for various metric units. Many people could estimate a centimeter as about the width of a finger, but how much pressure is one megapascal? Sure, it's defined as 1e6 Pa, but what's that mean to the root user?
Answers to this question should be written for a single unit. The format is as follows:
Unit name
Base SI unit: (mathjax describing unit and using only SI base units)
Common units: (unit of measure commonly used. If there's an equivalent measure in Imperial units, include it as well.)
Range name
Unit
Value Description
Value Description
Defined Constants:
- Constant - description (Link to the wikipedia page for that constant.)
Current units defined in this question:
Units that need a definition:
- Momentum (maybe)
- Luminance
- Conductance
- Capacitance
- Pressure
- Density
Feel free to add more.