And, if so, how much lift does it produce per cubic meter? (let's say at 290ish K and 150 meters above sea level)
For context, I'm taking an intro-level physics class. While I know what a joule is, I feel like I haven't really been able to internalize its meaning. Same goes for a couple of other SI units. This will probably improve with time, but that takes too long. And, as helpful as the Wikipedia "orders of magnitude" series has been, sometimes the mind's eye just doesn't cut it.
So, I'm making a real-life version of it (that may or may not become a YouTube video, depending on my motivation and free time)! (also, with different, fewer examples, and within legal-ish limits)
And I figured that one of the ways I could visualize a megajoule was by detonating a balloon filled with oxyhydrogen. But I feel like setting it off in the air and viewing with a drone may be cooler and possibly less disruptive than doing so on the ground. Of course, oxyhydrogen doesn't just explode when you ask it to. But I feel like my hobby-level background with electronics would help me out here. My plan, bear with me, is to use some random 8-pin SMD mcu and altitude sensor to short a small piece of metal across a tiny EDLC to bring it up to a high enough temperature to ignite the hydrogen. But, while I can design that while waiting for the stuff I ordered to arrive, I'd like to do so with some kind of weight constraint, if oxyhydrogen is lighter than air at all. Feedback on the ignition plan is also welcome.