Rowlett, Wikipedia, and some other sources seem to agree that there is a fuzzy
conventional value of explosive energy of 1000 calories per gram for TNT
(actual reported values range from 980-1100, or more). A kiloton of TNT
equivalent seems to be agreed as 10^12 calories, which would suggest a
NIST SP 811 (2008 Edition) specifies on Page 59 that a ton of TNT (energy
equivalent) is equal to 4.184 E+09 joule (J) with a footnote that this is a
Defined (not measured) value
Original message
Date: Fri, 15 Oct 2010 08:03:59 -0700 (PDT)
From: John M. Steele
You can do that with feet as well. Here's what you can't:
A miner is trapped 1,200 meters underground. How many kilometers is that?
In metric thinking, this isn't even a math problem--it's just a part of life
in which longitudinal distances can be freely compared to vertical
distances.
