**E = mcc** I know that’s supposed to be E = m c squared, but I don’t know how to do a superscript in UBB code. So E = mcc will have to do for now.

What are the units associated with Einstein’s equation? Joules, kilograms, meters, and seconds? British thermal units, long tons, rods, and fortnights? The last time I asked this question, I think I was in junior high school, and I was assured (by other junior high students) that it didn’t matter. I couldn’t figure that one out.

So I decided to ask again, hoping that it does matter, because if it doesn’t, my world view will need serious revision, something I can’t contemplate so hard on the heels of tax season.

Second, I have noticed the conspicuous lack of coefficients in Einstein’s equation. Heck, even kinetic energy (E = 0.5mvv) has a coefficent. Is this a major cosmic coincidence (assuming that units *do* matter, contrary to the opinions of a couple of 8th-graders)? I mean, they original came up with the definition of the energy, time, mass, and distance units without regard to one another, right? So, unless Einstein created a new unit to get rid of pesky coefficents, something really intense must have happened.

I hope I’m making sense here. It’s just weird that, of all the weird unit conversions I had to memorize, there wasn’t one for Einstein’s central equation. And I know mass-energy conversion is an intense concept in and of itself; it’s just double weird if it somehow knits together independently-derived units.