Other Sciences

Do we need better intellect here to discuss science or should it be open for everyone to discuss? Atleast good intelligence is required.

how can we improve linux os ? any new and unique ideas will help. and how can we make it more user friendly?

Help I'm hoping someone can help me out on this question. What is the capacity in tonnes of refrigeration of a system in which 1200 kg of the refrigerant are circulated per hour? The enthalpy of the vaporized refrigerant leaving the evaporator is 118 kj/kg and the enthalpy of the liquid refrigerant enetering the expansion valve is 64.66 kj/kg. I believe i have figured out the net refrigerating effect. It is done by subtracting the enthapy of liquid refrigerant enetering the expansion valve from enthapy of the vaporized refrigerant leaving the evaporator. That is 181 kj/kg-64.66 kj/kg = 116.34 kj/kg. The next step of the equation i'm not sure about. I know that th…

Im currently studying GCSE double award modular science and im in my 2nd year (year 11) my board is AQA and i cant find any science papers apart from the 2004 paper im sick and tired of trying to find them its impossible this sucks because im suppose to get exam practise and im not getting it :@ does anyone know any places where i can get some exam questions. Its imperative for me to get more exam papers possibily the mark schemes too. If any of you have any papers yourself could you email me at aaronsmith220789@yahoo.co.uk thanks alot all help is really appreciated.

I was wondering, is there a limit on how far radio waves can travel? Is there ever a point where a radio wave signal disappears completely, and can't be recovered no matter how powerful the receiver is? For example, my computer's wireless network card and the wireless receiver connected to my other computer both have a maximum distance of 1 mile. This means that if I moved the computers more than one mile apart from each other, I would not be able to send a file from one computer to another. However, if I had a stronger receiver on my other computer, would I be able to increase the distance the computers could be apart, or would the radio wave transmitted by my comput…

Define Entropy. No, its no joke. Define it.

We're having a contest on building a radio transmitter. The criteria is simple. Build a transmitter that sends voice, which can be tuned on a certain radio frequency nearby. It's got to be cheap and the parts must be easily available. So how do I go about it. P.S. The cheapest and the most effective one wins.

OK, This question probably has an easy answer, But it escapes me. Someone asked me this recently and I couldnt come up with a convincing answer. Why is it, That on a cold day, Say 20 degrees, Clear skies, That while in your car you can feel the heat of the sun on your face, Yet the window is very cold?

Possibly a stupid question, but here goes. I was looking at a .jpg posted in another thread showing plate movements over the millennia. (Right hand side of picture.) http://departments.oxy.edu/biology/bbraker/courses/bio105/images/15.3A,B%20Earth's%20crustal%20plat.JPG I realised that in all the depictions I've ever seen, Antarctica doesn't move. Every other plate happily wanders all over the place, but not that one. I"m not saying it's wrong, it just seems "funny". Does anyone out there know why one plate doesn't move? A secondary question. If Antarctica was in the same place for the last 150 million odd years, (and therefore covered with ice since the time …

Why does equatorial divergent upwelling work only for ocean surface currents traveling from east to west and not west to east?

Bitumen can behave as a glue at relatively low temperature, how can this property be explained using its microstructure?

I have just confirmed that a mineral that I found last week on a field trip is actually new to science!!! And I'm completely psyched!! For those who don't know much about mineralogy, there are only about 4,000 seperate mineral species known to man and only about 30 new species get discovered worldwide every year. To discover a new mineral species at my age is pretty cool (i think anyways) The mineral is related to pyromorphite, and has the approximate formula Pb3Ca2(PO4)3(OH,Cl). Don't know what we are going to name it yet, possible mineralhillit, after the name of the mine in which it was found.

A Jacob's ladder is a device that basically shows off the power of high voltage supplies. It is built with two long conductors in a 'V' shape with the bottom points close but not touching. When you apply a high voltage current it will arc across at the bottom. As the air heats up and rises the resistance is lowered and the arc travels upwards. When it reaches the top the resistance at the bottom of the 'V' is now lower than at the top where the arc is because the air is no longer being heated under it. At the point the arc disappears and the process starts over again. Obviously, a higher current power supply will heat the air up more and allow the arc to be drawn out…

If a food is in a plastic container and I heat up the food while it is in the plastic container, does the melted plastic contaminate the food? What about with plastic wrapping?

I have a rectangular magnet with dimensions of 2x3x1 cubic cm How do I break it in half to become 2 pieces about 2x1.5x1 cubic cm?

Someone asked me that if you could travel throug the time and i instantly said no. But thinking about it, yes you can travel to the time, if you could do some stuff. For example... if you invert all electromagnetic field and run your electrons spin exactly the opposite you´d be travelling to the time backwards... Thinking that you could build a machine that inverts the electromagnetic fields, then you enter in... spend one hour inside then you turn it on.... you´ll travel backwards 1 hour. Einstein could never bind electromagnetic fields with gravity.. i dont think is to hard (hypotheticaly) though everything responds to electromagnetic fields, gravity is …

This is quite simply the most remarkable item I have read in two decades or more. I am astounded. I checked the date on the article three times to make certain it wasn't an April Fool joke. I can't believe I have never run across this before. http://www.guardian.co.uk/life/feature/story/0,13026,1108853,00.html Some quotes in summary: Each year less light reaches the surface of the Earth. No one is sure what's causing 'global dimming' - or what it means for the future. In fact most scientists have never heard of it. Atsumu Ohmura at the Swiss Federal Institute of determined that levels of solar radiation striking the Earth's surface had declined by more than …

here`s a question I`de just Love an answer to! the other day I bought one of the blocks of "Soap" made from stainless steel, it`s supossed to remove the smell of Garlic from your fingers after cutting it up, just by washing your hands with it in plain water. I thought yeah Right! more Gimic spoof Science garbage. it was only 50p so I bought it, I`ve just tried it and even deliberately rubbed garlic on my hands, IT WORKED!!!! and yet normal soap hardly shifts it? anyone know WHY/HOW?

Ok, I'm no meteorologist but I know that the weather on the west coast is influenced by the temperature of the pacific ocean. I'm curious, could the Tsunami have displaced enough warm water into or drawn enough water out of the Pacific to temporarily change the weather pattern? I know that we're talking about a butt load of water in the pacific, but hey thought I'd ask.

Hello fellow scientists, I am starting a new website, based on scholasticism, and one of the things I'm including is the publication of articles pertaining to different subject matters. If any of you have unpublished articles that you have written, or are interested in writing an article that you would like to see published, please let me know. Basically, I have lots of bandwidth to kill, and this collection would be more reputable than, say, a personal page provided by Yahoo! or AOL. You can PM me for more details. Sincerely, cweb255

I have this literature anthology from english class, it's over two thousand pages long, but from the outside it doesn't look like it, because the pages are really thin. My question: What is this paper made out of and how do they get it so thin?? Thank you

First off I wasnt sure where to put this so i just put here. I was wondering if anybody knew of a lab or the equations to figure out weight of electrons. I know you have to do stuff with magnets and a cathode ray gun which i have access too..but what are the equations to figgure out the weight of electrons. I mean i all ready know how much they way i just wana like prove it to myself cuz i dont have anything better to do. I looked on the internet but i really havent found anything yet so any help will be appreciated.

At times, I hear this funny, high pitched ringing sound in my ear. What is it? What is causing it? It does NOT happen when i hear a loud sound.

Since the first law of thermodynamics says that energy cannot be created or destroyed, only converted to one form or another....then the amount of energy when the universe was created would be total amount of energy available in the universe? Is there a way to know how much energy there was when the universe was created? Or maybe can one quantize the amount of energy say on earth and the atmosphere?

In another word, who solved more problems than another couldn't solve??? Maybe unmeasurable, who is the smartest?? Albert