And just how, pray tell, do you think they measure the mass of the bars Mr. Nitpicker? Some elaborate physics experiment?
Using either a beam balance, or a force-measuring scale that's locally calibrated with a known reference mass.
It's sometimes an acceptable shorthand to express a weight in grams, but not when that's the whole point of the story. The _mass_ in grams is (hopefully) not changing. The _weight_ in newtons (or any other dimensionally-correct unit you prefer) is what's changing.
If you're using a device that measures weight and reports it in grams, then you need to re-calibrate it against a known reference mass at each new location.
p.s. don't forget about buoyancy. Accurate measurements need to be done in a vacuum chamber.
Nothing reads like time cube. Nothing.
First off, your brain starts to bleed just from the background image
The funniest thing for me is that when you finally scroll down to the bottom of that wall of crazy-text, there's a "next page" link.
The picture in the abstract shows where the iron ion is located. It's not at the very tip of the spike. It's a bit further back, holding a few protein pieces together.
If you really want a kit you can buy an assembled board, de-solder all of the components, and *make* a kit.
Ostensibly, they allow for more brains behind the card than is possible with a magstripe.
You get that benefit from having a microprocessor on the card, such as a standard "chip card" with metal pads (like a SIM card) that you insert into the reader. Adding all of the RFID nonsense on top of that just makes it less secure.
(I'm aware that "chip+pin" also has known security flaws, but it's better than the alternatives).
It's not quite that simple. Although ethanol has a lower energy content, it has a higher "octane number" and can be used at higher (more efficient) compression ratios than regular gasoline. An engine specifically designed for E85 wouldn't necessarily be much less efficient than one designed for standard gasoline.
However, cellulose-derived butanol is probably a better long-term solution.
There's more to life than just "calories". You also need a supply of amino acids to make new proteins (such as enzymes), and if there aren't enough of these in your diet then the only option is to break down muscles or other important tissues. Fat reserves can be used as energy and can even be used to synthesize glucose for the organs that require it, but there's no way to make amino acids from fat.
Don't forget about CANDU reactors. They use a heavy-water moderator and are able to burn a wide variety of fuels including plutonium, natural uranium, or "spent" fuel from a light-water reactor.
Kids today may not know this, but the former Soviet Union launched a series of radar satellites that were powered by full fission reactors (not just RTGs). At the end of their service life they were designed to eject the reactor cores and boost them into a higher parking orbit.
Most of the time it worked, and those spent reactor cores are still up there with all of the other space debris. However there were a few notable failures, including the 1978 uncontrolled re-entry of Kosmos 954 which sprayed radioactive contamination across a large stretch of northern Canada. It was just luck that it came down there rather than over a more populated section of the planet.
The Mint isn't selling this coin, they just made it for funzies.
Anyone wanting to actually buy a huge gold coin will have to settle for a $1 million Canadian Maple Leaf.
If two inches of snow can shut down your town, you're not living in Canada.
Technically, Vancouver and Victoria are still part of Canada.
He who steps on others to reach the top has good balance.
