dirtyamerica

I work at a coal fired power plant. My supervisor recently mentioned that to further reduce NOx emissions (beyond our current boiler modifications) we could add a urea reagent into the air quality control system. As a joke I wanted to ask him where we got the urea from (the bathroom? haha). Seriously, to the point...how is urea manufactured? I've tried to research my answer and all I get is pee-related stuff and vendors that sell it for ag fertilizer. But how's it made? I'm just curious about the basics. I don't want to make my own or anything. So if anyone knows, just please give me the "Urea for Dummies" version. hehe thanks in advance

this contradicts a previous post but low reps/high weight will make you strong and big high reps/lower weight will give you endurance and tone. diet is most important. Lower your fats just a little (from 33% to 25% of daily caloric intake) . Eat more protein, expecially within an hour of working out. stay hydrated. Vegatables have unlimited benefits to your health so always keep eatin' them. I like eating fish after a workout a few times a week. Omega 3's, protein and chondrition (for joint maintainance). Don't overwork your body. Give your body or muscle groups time off to heal and rebuild (couple days?). I take whey protein as a complement to my diet and sometimes NO explode. DON'T EVER take anything illegal or harmful. You want to create a fit body not destroy it.

as Rene Descartes would say: "I think, therefore, I am."

speaking of new states of matter, I really dig the new metamaterial they're coming out with.. http://en.wikipedia.org/wiki/Metamaterial and it's possible applications.

Now try to find a youtube video filmed in Europe where they use 50Hz AC.

I think intelligence is difficult to assess considering that there isn't really a definative answer as to what intelligence is. I studied several theories on intelligence back in the good ol' days of college. I never did hear of a unversal definition of what it is though. Sure, you could say "it's how smart ya are" but the brain is too complicated as well as assessing it accurately.

I'll believe that telekinesis is real once a prestigious scientific journal or mag publishes such info. Until then, I continue to take anything like this on the internet with a grain of salt. Sorry, I didn't watch the video..the internet just doesn't seem like a very reliable source.

the floating balloon is buoyant and geostationary in your example. Objects in geostationary orbits are falling at the same speed as they are traveling forward (for a lack of a better description).

I'm a proponent of coal energy (considering I work at a coal plant) as it's a very reliable source of energy. The technology for capturing greenhouse gases is continually improving. It's just a matter of retrofitting existing plants, building new, state of the art plants and motivating poorer contries to go greener with their fleets of energy centers. Just as well, I'm for nuke energy. I wouldn't want nuclear waste stored in my backyard but here's how I justify it: So many tons of nuke waste, buried in a secure, underground location, IMO, is far less damaging than the output of all those unwanted gases that we breathe and wreak havoc on our climate. I don't know the statistics of waste output between a coal plant vs. a nuke plant....I'm just sayin'.. In either case, you still have the release of heat from processes and equipment, just not the gases from a nuke plant. To this day, it still cracks me up when I see a clip on tv about pollution and they show the cooling towers of a nuke (or coal) plant...so water vapor is a pollutant? hehe

+1. We are curious by nature. Our curiosity is what allowed us to try new food and methods of survival back in our more primal years. Bring on the learnin'!!!

What if your body had time to equalize pressure like a scuba diver as the balloons are being piled up? Interesting discussion. Surely the balloons would exert some outward force on the sides of the test vessel. Digressing a bit, but I once heard that an infinite amount of cornflakes can be stacked up without crushing the ones on the bottom because of their shape and the ability to distribute weight horizontally. Can't prove it though. i'm sure a link could be found about it but....

The centripetal force that acts on the laundry is done by the spinning drum. It keeps the clothing from flying off. At the top of the path of the clothing's travel, additional centripetal force (gravity) kicks in and the clothing falls until it meets back up with the dryer drum (having overcome the centrifical force of it's acceleration (not really and change in speed but it's constantly changing direction). The falling clothing allows the laundry "air time" to aid in drying and a mechanical way of changing the position of the fabrics so different areas are exposed to the warm air.

Let's say you have two teams: Little Guys and Big Guys. The Big Guys have more inertia. They'll take more to get them to get pulled into losing but they also have (generally) more strength to create a net force on the rope in their favor. I would guess that even if the Little Guys dug heel divots into the dirt they'd still loose to the Big Guys. To me it doesn't seem like a friction thing as much as inertia and more importantly FORCE.

I'm going to veer off topic a second..hehe I like the concept of the fire tetrahedron: heat, fuel, oxygen and a chem rxn. You need all four for combustion. I agree with your comment about the slag, Captain. Surely there is some carbon left. I can't assume comeplete and total combustion of the coal has happened but what is left over as slag, fly ash, etc. is far from flammable.

I work in a coal fired power plant. When the boilers are tuned up and running as efficient as possible the left over slag will not burn. It is completely combusted. Perhaps any other places that yeild unspent carbon ash would be to inefficient to further convert to energy.

When it comes to learning abstract things such as chemistry, you have to digest the information in ways that make sense to you and that will help you remember it better. Even if it's silly it works. But yeah, need more details.

You're best off avoiding this project. Even nos used at the dentists' office is mixed at a predetermined ratio with oxygen. You're going to hurt yourself.

You're quite welcome. Thanks for the kudos. First, you got on here and asked about ice stuff ( http://www.scienceforums.net/forum/showthread.php?t=36443 ). Then you gave up after a few hours. Next, you started this thread about a new project about propellers. You came on here and made no reference whatsoever to any work you've done so far regarding propellers. You even asked for dummy-proof info on propellers suggesting that you have done zero research as of yet. Get it??? When it comes to me vs. you, I'd say that I have thought first. I do wish you well on your project. I will humor you. If I see any good stuff on propellers I'll post links here. Peace, DA

sweet, another good reason to talk the family into a camping trip!!!

Sure you could if your spacecraft could slingshot around the sun fast enough to acheive escape velocity. Or slingshot fast enough off a massive outer planet like Jupiter. I don't know about Voyager's escape route out of our solar system but it's out of it now. Check it out: http://en.wikipedia.org/wiki/Voyager_1 Oops, I didn't see iNow's post but I definately agree with him!

google.com seems like the only real variable you care to avoid is the "effort" variable.

Your theory covers the visual but how can a medium here them or communicate what the ghost is trying to say? just wonderin

You don't even need worms if you have TNT or an old crankable telephone.

hehe good one!

makes sense, we are due for the opposite end of this 11 cycle in 2012, where we will have an increase in sunspots and mass coronal ejections.