From the makers of submarine screen doors
Basically the same catalysts have been reported previously. In this new paper, they don't bother to highlight the fact that their films are extremely thick, so of course they get great catalytic activity (though it's an oxide, so the series resistance might just be a problem...)
Newton's third law doesn't necessarily mean the same amount of work is done on both objects. For instance, consider a block attached to a spring attached to a wall. With the spring initially compressed, it does work on the block as it moves away from the wall, but the spring does negligible work on the wall because the wall is not moving. Substitute pressurized gas for spring, bullet for block, and rifle for wall. An added complication is that the force on the bullet is actually due to gases in the barrel, so if the gases are accelerating then the rifle will feel a different force than the bullet.
The best way to analyze the situation is using conservation of momentum. Assuming the bullet and rifle are both at rest before firing, total momentum must be zero. Take
You could check wikipedia for "Free Recoil" and "Muzzle Energy" if you want to see how accurate my approximation is.
According to Wikipedia, as of 2008-04-30, ethanol production is no longer subsidized. Care to provide a source countering that?
And to the people who say that more energy is consumed in producing corn I'd also ask for a source. According to the DOE, has a positive energy balance. (Granted, the source is the government, so I guess they're only saying that because of corn lobbyists)
I'm honestly willing to hear claims to the contrary, but all I see here on slashdot is a bunch of people saying that ethanol is bad without citing any research (even TFA didn't cite any original research)