Basic Nuclear Science Information Nuclear Structure | Radioactivity | Alpha Decay | Beta Decay |Gamma Decay | Half-Life | Reactions | Fusion | Fission | Cosmic Rays | Antimatter Nuclear Structure . An {*style:<a href='javascript:windowOpener('Glossary.html#Atom',%20'glossary');'>*}atom consists of an extremely small, positively charged {*style:<a href='javascript:windowOpener('Glossary.html#Nucleus',%20'glossary');'>*}nucleus surrounded by a cloud of negatively charged {*style:<a href='javascript:windowOpener('Glossary.html#Electron',%20'glossary');'>*}electrons. Although typically the nucleus is less than one ten-thousandth the size of the atom, the nucleus contains more than 99.9% of the mass of the atom! Nuclei consist of positively charged {*style:<a href='javascript:windowOpener('Glossary.html#Proton',%20'glossary');'>*}protons and electrically neutral {*style:<a href='javascript:windowOpener('Glossary.html#Neutron',%20'glossary');'>*}neutrons held together by the so-called strong or nuclear force.
Online Scientific Calculator Download eCalc Scientific Calculator Windows VersionMac OSX VersionView More Downloads Online Calculator and Math Help eCalc is a free and easy to use scientific calculator that supports many advanced features including unit conversion, equation solving, and even complex-number math. eCalc is offered as both a free online calculator and as a downloadable calculator. Input Mode (Algebraic vs. The online calculator operates in either algebraic input (default mode) or RPN input. Algebraic Mode Algebraic input mode is commonly referred to as "infix notation" and is widely used by most handheld calculators. Graphical Button and Keyboard Support The online calculator supports data entry through either a graphical button or through the use of traditional computer keyboard keys. Stack The stack is a feature of the calculator that provides a way to view a history of results. Pallet Intro Basic Functions Addition The addition (sum function) is used by clicking on the "+" button or using the keyboard.
The Top 10 Psychology Studies of 2010 The end of 2010 fast approaches, and I'm thrilled to have been asked by the editors of Psychology Today to write about the Top 10 psychology studies of the year. I've focused on studies that I personally feel stand out, not only as examples of great science, but even more importantly, as examples of how the science of psychology can improve our lives. Each study has a clear "take home" message, offering the reader an insight or a simple strategy they can use to reach their goals , strengthen their relationships, make better decisions, or become happier. 1) How to Break Bad Habits If you are trying to stop smoking , swearing, or chewing your nails, you have probably tried the strategy of distracting yourself - taking your mind off whatever it is you are trying not to do - to break the habit. That's because habit-behaviors happen automatically - often, without our awareness. J. 2) How to Make Everything Seem Easier J. 3) How To Manage Your Time Better M. 4) How to Be Happier J.
6 Scientific Discoveries That Laugh in the Face of Physics As we've pointed out before, there are some startlingly simple questions that science can't answer. And then there are the special occasions where the universe up and does a freaking magic trick that seems to be designed by an unjust, all-powerful entity dedicated to making scientists slowly pull off their glasses while saying, "What in the hell?" For instance ... #6. The Sun Can Make Stuff Hotter Than Itself We intuitively understand the direction that energy travels -- from the thing with energy to the thing with less energy. GettyThat asshole always has to be the center of attention. There's a discrepancy between what science says should happen and what the sun actually does, and it's known as the sun's coronal heating problem. The facts are pretty straightforward; the sun's surface sits comfortably at a blazing temperature of roughly 5,500 degrees Celsius. GettyHe's a loose cannon! GettyWould anything this awesome-looking follow rules dreamed up by some nerds? #5. #4. Getty"Wizards.
Banana equivalent dose A banana equivalent dose (abbreviated BED) is a unit of radiation exposure, defined as the additional dose a person will absorb from eating one banana. The concept is based on the fact that bananas, like most organic materials, naturally contain a certain amount of radioactive isotopes—even in the absence of any contamination due to human nuclear endeavors. The banana equivalent dose was meant to express the severity of exposure to radiation, such as resulting from nuclear power, nuclear weapons or medical procedures, in terms that would make sense to most people. History[edit] The concept probably originated on the RadSafe nuclear safety mailing list in 1995,[original research?] Relationship with standard units[edit] The BED is supposed to be a radiation dose equivalent unit; that is, a unit for measuring potentially damaging radiation absorbed by body tissue, rather than the total radiation (of any kind) emitted by a source or absorbed by matter. Criticism[edit] See also[edit]
Frequent Halos Halos appear in our skies far more often than do rainbows. They can be seen on average twice a week in Europe and parts of the United States. The 22° radius circular halo and sundogs (parhelia) are the most frequent. In this HaloSim3 simulation the sun is surrounded by a 22° halo and flanked by sundogs. Passing through the sundogs and extending beyond them is the parhelic circle. It sometimes encircles the whole sky at the same altitude as the sun. Click the simulation text to go to the halo. 13 Unique Punctuation Marks You Never Knew Existed With the rise of technology, 140 character tweets and SMS shorthand texts ("BWl! Aamof afaik gonna mari him cuz im in luv wit him!" = "Bursting with laughter As a matter of fact, as far as I know I'm going to marry him - because I'm in love with him.") the English language is under attack. But fear not, we're going to arm you with 13 of the most deadly and pretentious punctuation marks in the history of the written word, soon enough you'll be able to come across as a well-educated and well-rounded private school Boffin. Plus you'll sound cool doing it, how could using a symbol called the 'Interrobang‽' not be awesome right? Despite it's epic name 'Asterism' and great design, its use is rather underwhelming. It's also known as an Obelisk. It's easy to think this is just your typical slash but don't be fooled. This little symbol actually has 3 other names, it can be called a Wedge, an Up-Arrow and even a Hat. The best of both worlds right? The best buddy of the Exclamation Comma.
2012 March 12 - The Scale of the Universe Interactive Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 March 12 The Scale of the Universe - Interactive Flash Animation Credit & Copyright: Cary & Michael Huang Explanation: What does the universe look like on small scales? Tomorrow's picture: dust before galaxies Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)NASA Official: Phillip Newman Specific rights apply.NASA Web Privacy Policy and Important NoticesA service of:ASD at NASA / GSFC& Michigan Tech.
Absolute hot Absolute hot is a concept of temperature that postulates the existence of a highest attainable temperature of matter. Contemporary models of physical cosmology postulate that the highest possible temperature is the Planck temperature, which has the value 1.416785(71)×1032 kelvin.[3] This value is assumed to be the highest temperature because conventional quantum physics relies on Planck's law which implies a lower limit for the wavelength of electromagnetic radiation. The models of the origin of the universe based on the Big Bang theory assume that the universe has passed through this temperature about 10−42 seconds after the Big Bang as a result of enormous entropy expansion.[3] Above ~1032K, particle energies become so large that there is no existing scientific theory for the behavior of matter at these energies. Gravitational forces between them would become as strong as other fundamental forces, requiring a hypothetical theory of everything for description.[4] See also[edit]
Rock Key The Rock Identification Key - by Don PeckRock Key Table of Contents What Are Rocks? Rocks are what the crust of the earth is made of. They are the mountains and the bottom of the ocean. [ Return to Rock Key Table of Contents ] What Minerals Form Rocks? Top 40 Useful Sites To Learn New Skills The web is a powerful resource that can easily help you learn new skills. You just have to know where to look. Sure, you can use Google, Yahoo, or Bing to search for sites where you can learn new skills , but I figured I’d save you some time. Here are the top 40 sites I have personally used over the last few years when I want to learn something new. Hack a Day - Hack a Day serves up fresh hacks (short tutorials) every day from around the web and one in-depth ‘How-To hack’ guide each week.eHow - eHow is an online community dedicated to providing visitors the ability to research, share, and discuss solutions and tips for completing day-to-day tasks and projects.Wired How-To Wiki - Collaborate with Wired editors and help them build their extensive library of projects, hacks, tricks and tips.