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Earth-Moon Center of Gravity
Name: David C.
where is the center of gravity for the earth-moon system,
what effect does this have on the orbit of the earth around the sun?
The center of gravity of the earth-moon system is inside the earth on the
line between the centers of the two bodies. This center of mass proceeds
ar... | <urn:uuid:f6c2eed9-fd53-4d4f-a8c2-5dc5b6dc568e> | 3.875 | 298 | Q&A Forum | Science & Tech. | 69.184502 |
As a prelude to a new book, Nigel Calder (who was the editor of New Scientist for four years in the 1960s) has written an op-ed for the Times (UK) basically recapitulating the hype over the Svensmark cosmic ray/climate experiments we reported on a couple of month ago (see Taking Cosmic Rays for a spin). At the time we ... | <urn:uuid:0dbd3977-218a-4bf4-9ed4-1912bf9e464f> | 2.765625 | 255 | Comment Section | Science & Tech. | 33.718403 |
It is estimated that two-thirds of sulfur dioxide (SO2) air pollution in North America comes from coal power plants. In a recent scientific article published in Geophysical Research Letters, a team of scientists have confirmed that SO2 levels in the vicinity of U.S. coal power plants have fallen by nearly 50% since 200... | <urn:uuid:6fe0f36a-581a-48ef-8e44-26c47745474d> | 3.046875 | 1,854 | Personal Blog | Science & Tech. | 43.610655 |
Astronomers have switched on the first 42 radio dishes of the Allen Telescope Array and are collecting data -- both for conventional radio astronomy, and the search for extraterrestrial life. A total of 350 dishes are planned for the array, which will allow astronomers to image large portions of the sky in one exposure... | <urn:uuid:8fd96fdf-908d-4c14-9a87-8c1862c4fcab> | 3.1875 | 173 | Truncated | Science & Tech. | 37.95 |
Regions or areas bounded by drainage divides and occupied by drainage systems; specifically the tract of country that gathers water originating as precipitation and contributes it to a particular stream channel or system of channels, or to a lake, reservoir, or other body of water. [Glossary of Geology, 4th ed.]
Descri... | <urn:uuid:2cb3cecb-d6d6-4dde-93ab-6c4924c10540> | 3.171875 | 377 | Content Listing | Science & Tech. | 20.632707 |
- Arnaud Le Hors, W3C
- Robert S. Sutor, IBM Research (for DOM Level 1)
Several of the following term definitions have been borrowed or
modified from similar definitions in other W3C or standards documents.
See the links within the definitions for more information.
- 16-bit unit
- The base unit of a
DOMString. This ind... | <urn:uuid:ec825b0c-193f-40e6-8e2a-aa7702ba5d7f> | 3.65625 | 2,135 | Structured Data | Software Dev. | 37.05627 |
Just a quicky on what will probably become a fairly large story:
A difference in the way British and American ships measured the temperature of the ocean during the 1940s may explain why the world appeared to undergo a period of sudden cooling immediately after the Second World War.
The scientists point out that the Br... | <urn:uuid:db86bd2a-1385-4036-9b01-d43c6cbef7b1> | 3.140625 | 306 | Comment Section | Science & Tech. | 46.447556 |
Termites And Global Warming
It is an established fact that termites cause more damage in dollar terms worldwide than the combined ravages of fire, flood, earthquakes, tornadoes and hurricanes combined.
Having come to terms with those statistics, we now have to contemplate the notion that termites are also responsible f... | <urn:uuid:108d16ed-0d1b-48b8-b430-fbb0b815c0ae> | 3.1875 | 510 | Personal Blog | Science & Tech. | 23.793632 |
Many transition metal solutions are brightly colored. From left to right, aqueous solutions of: cobalt(II) nitrate; potassium dichromate; potassium chromate; nickel(II) chloride; copper(II) sulfate; potassium permanganate.
Question: Why Are Transition Metals Called Transition Metals?
Most of the elements on the Periodi... | <urn:uuid:60cf6154-ad50-420a-a38f-f214ead6ba08> | 4.125 | 214 | Knowledge Article | Science & Tech. | 39.159339 |
Synchronous Channels using MVars
An MVar in Haskell is a shared variable that is either full, or empty. Trying to write to a full one, or read from an empty one, will cause you to block. It can be used as a one-place buffered asynchronous channel. Consider if you didn’t want choice, or conjunction or any of the fancy f... | <urn:uuid:f395692c-ce0f-4ccb-b569-a1fef49f09da> | 3.0625 | 866 | Documentation | Software Dev. | 49.957733 |
Even before design of
began in 1996, it was evident that one of the major problems to be
encountered in building parallel databases would be communication
between the nodes in the network. For this reason,
NDBCLUSTER was designed from the very
beginning to permit the use of a number of different data
transport mechanis... | <urn:uuid:a7b2f1ac-ee64-4da5-a1ad-e3141c97c531> | 2.765625 | 477 | Documentation | Software Dev. | 47.409471 |
There are other theories around the PETM and the details remain uncertain. However it can be said with some confidence that the PETM started with a warming due to CO2 emissions that was then amplified by a low carbon13 source, methane seeming the least problematic option. In most areas of science one can afford to rema... | <urn:uuid:3730f832-306f-4711-993b-18a5c5913493> | 3.421875 | 2,897 | Personal Blog | Science & Tech. | 36.420123 |
The BOREAS AFM-03 team used the NCAR Electra aircraft to make sounding measurements to study the planetary boundary layer using in situ and remote-sensing measurements. Measurements were made of wind speed and direction, air pressure and temperature, potential temperature, dewpoint, mixing ratio of H2O, CO2 concentrati... | <urn:uuid:e4ede275-327b-4467-ab28-c34471a8cac2> | 3.078125 | 168 | Knowledge Article | Science & Tech. | 40.212866 |
Catching and Throwing Standard Exception Types
The following guidelines describe best practices for some of the most commonly used exceptions provided by the .NET Framework. For a complete list of exception classes provided by the Framework, see thedocumentation.
Exception and SystemException
Do not throw System.Except... | <urn:uuid:6b494fba-2025-4c47-aad5-457a63838450> | 2.796875 | 744 | Documentation | Software Dev. | 23.729781 |
The Babel fish is one of the more inspired forms of fictional biodiversity. It features in the Hitchhiker’s Guide to the Galaxy by Douglas Adams (sadly no relative), and allows his antihero, the ape descendant Arthur Dent to traverse the universe with only his speaking handheld digital assistant, the Hitchhiker’s Guide... | <urn:uuid:a7ba9f28-c358-490f-b389-d2c6f97243e1> | 3.03125 | 1,497 | Personal Blog | Science & Tech. | 30.584952 |
The Exponential Clothesline
Many students have difficulty expressing large numbers using exponential notation. The exponential clothesline helps to pre-assess student understanding of exponents by providing a visual representation of exponential notation (powers of ten). The Exponential Clothesline Conversion Table wil... | <urn:uuid:c532c9f7-c16f-4443-b32a-01ec5ab6501f> | 4.15625 | 715 | Tutorial | Science & Tech. | 42.866862 |
The chemistry of inkjet printer ink
Whatever technology is applied to printer hardware, the final product consists of ink on media, so these two elements are vitally important when it comes to producing quality results. The quality of output from inkjet printers ranges from poor, with dull colors and visible banding, t... | <urn:uuid:bbd470b8-841c-4664-8872-68824834f3f1> | 3.375 | 506 | Knowledge Article | Science & Tech. | 36.992937 |
Website Detail Page
written by the Kansas State Physics Education Research Group and Dean A. Zollman
This resource illustrates the interference patterns for diffraction through double slits. A series of sources, electrons, protons, neutron, photons, and pions, can be chosen for the virtual experiment. The energy of the... | <urn:uuid:f46085ec-3e2b-4f66-9b31-178be3af07c9> | 3.765625 | 399 | Content Listing | Science & Tech. | 27.227771 |
Concave Mirror Images
Why is that you can see a REAL image in a concave mirror
when you are looking into the mirror?
A real image is not necessarily an image that is really you. A real image
is one that really has light coming together at it. Place a piece of paper
where the image appears to be located. If you see a pi... | <urn:uuid:2514f02d-d061-49d0-9536-3ac7ec64486f> | 3.4375 | 219 | Knowledge Article | Science & Tech. | 59.175796 |
Waves, Sound and Light: Wave Basics
Wave Basics: Audio Guided Solution
A wave is traveling in a rope. The diagram below represents a snapshot of the rope at a particular instant in time.
Determine the number of wavelengths which is equal to the horizontal distance between points …
a. … C and E on the rope.
b. … C and K... | <urn:uuid:9cd3da61-f6be-44ef-96d7-e66d28763252> | 3.90625 | 365 | Tutorial | Science & Tech. | 71.252578 |
Net ocean heat content changes are very closely tied to the net radiative imbalance of the planet since the ocean component of the climate system has by far the biggest heat capacity. Thus we have often made the point that diagnosing this imbalance through measurements of temperature in the ocean is a key metric in eva... | <urn:uuid:80dddb75-a183-4626-9211-21ca88acb8f9> | 2.8125 | 1,241 | Comment Section | Science & Tech. | 43.021669 |
by Staff Writers
Reno NV (SPX) Oct 16, 2012
An extraordinarily crowded planetary system is providing critical clues for understanding why most known planetary systems appear different from our own solar system. Using data from NASA's Kepler space mission, scientists are investigating the properties of KOI-500, a planet... | <urn:uuid:787e3897-ef52-41e2-b0ca-ab256d0d2936> | 3.5625 | 1,084 | Truncated | Science & Tech. | 42.959437 |
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.
2009 February 4
Explanation: On the distant planet HD 80606b, summers might be dangerous. Hypothetic life forms floating in HD 080606b's atmosphere ... | <urn:uuid:3a979607-f167-406c-887c-87760d8efe7e> | 3.609375 | 290 | Knowledge Article | Science & Tech. | 51.744737 |
(The second installment in Saul Griffith's energy literacy and climate change presentation -- Ed.)
The result of our energy use:
Carbon Dioxide concentration in the atmosphere.
Scientists have now been studying the concentration of carbon dioxide in our atmosphere for more than half a century; They principally use two ... | <urn:uuid:34846648-34f4-471f-826b-2c74b39c715f> | 3.34375 | 1,601 | Knowledge Article | Science & Tech. | 46.992037 |
The unit circle is the set of all points , but nesting the sine function in this formula, , gives the sine oval, which becomes progressively more squarish with increased levels of nesting (controlled by the slider). Change the graph to "sin" to examine the nested sine function alone, whose squarish behavior is not shar... | <urn:uuid:735bb7fb-41e9-4fec-884e-55dc39175685> | 3.28125 | 244 | Tutorial | Science & Tech. | 35.585032 |
Comprehensive DescriptionRead full entry
BiologyA pelagic (Ref. 26340) schooling species usually found in offshore reefs (Ref. 9710). Juveniles are encountered along shores of sandy beaches, also over muddy bottoms (Ref. 9626). May penetrate into brackish water and ascend rivers. Feed on fishes, shrimps, and other inve... | <urn:uuid:5ce584bc-486e-4660-a2f8-41f1be91b714> | 2.96875 | 101 | Knowledge Article | Science & Tech. | 48.773994 |
An Introduction to the Philosophy of Mathematics
Table of Contents
1. Mathematics and its philosophy
2. The limits of mathematics
3. Plato's heaven
4. Fiction, metaphor, and partial truths
5. Mathematical explanation
6. The applicability of mathematics
7. Who's afraid of inconsistent mathematics?
8. A rose by any other... | <urn:uuid:eabc4c7d-3501-4f33-a415-ced74bd3abf1> | 3.40625 | 92 | Content Listing | Science & Tech. | 48.648987 |
The Arctic is warming much faster than the rest of the planet, and as a result, sea ice is receding opening northern sea routes. This will increase the level of commercial shipping and give an easier access to the resource wealth of the region (hydrocarbons, minerals, and fish). The detrimental effect on land and marin... | <urn:uuid:0f49cb98-8ed4-457b-a128-b4211457d7d4> | 3.3125 | 436 | Knowledge Article | Science & Tech. | 21.826487 |
Our astronaut William Anders must keep warm
when he is in space. NASA spent a long time designing and making materials that
would keep heat in and stop astronauts getting cold. A material that does not
let heat pass through easily is called a THERMAL INSULATOR. Click on the button
below to try an online experiment with... | <urn:uuid:c05ee6e1-6e7d-4d1e-bf23-61c197e48035> | 3.671875 | 177 | Tutorial | Science & Tech. | 56.704104 |
Add your answer here.
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Co... | <urn:uuid:adcd10d4-8555-4168-8920-1ad09c25c10a> | 2.875 | 184 | Q&A Forum | Science & Tech. | 66.463399 |
by Duncan Steel
This article was
printed in IMO's
edition of the WGN Journal.
It was written by Duncan Steel
There is evidence that there were two massive bolide explosions
which occurred over South America in the 1930's.
One seems to have
occurred over Amazonia, near the Brazil-Peru border, on August 13,
1930, whilst ... | <urn:uuid:bd33643b-c621-41f3-9d0f-2e04df6bed5c> | 2.953125 | 2,456 | Nonfiction Writing | Science & Tech. | 55.549159 |
What are the disadvantages of solar power?
Solar power has few disadvantages. It offers the promise of free, clean, reliable energy, as well as a slew of other advantages on a larger social and economic scale. However, solar power is not perfect.
We can rely on the sun rising every morning, and we even know its whereab... | <urn:uuid:21ff1ee7-d832-400b-a3d3-c49342ec62b0> | 3.140625 | 325 | Knowledge Article | Science & Tech. | 34.86099 |
Bats can see as well as humans can, but they have evolved a sophisticated method of using sound that enables them to navigate and find food in the dark called echolocation. Bats produce echolocation by emitting high frequency sound pulses through their mouth or nose and listening to the echo. With this echo, the bat ca... | <urn:uuid:2a3e0322-5bf8-4bc6-821e-417cff5df584> | 4.03125 | 902 | Knowledge Article | Science & Tech. | 51.092886 |
|Habitat and Ecology:
Behaviour This species is fully migratory, the main routes of migration being along Arctic coastlines (Snow and Perrins 1998). It arrives on the breeding grounds in early-June (Madge and Burn 1988, Scott and Rose 1996) where it may breed in small, loose colonies (Madge and Burn 1988, del Hoyo et a... | <urn:uuid:63daa7fe-9778-4dd8-babc-7b92cd87700a> | 3.28125 | 1,529 | Knowledge Article | Science & Tech. | 60.529115 |
What's the one sure-fire way to save an animal from extinction? Turn it into a pet, says Michael Archer, director of the Australian Museum in Sydney. With many of the country's native animals in serious trouble, he wants Australians to stop canoodling with dogs and cats and cuddle a quoll or a possum instead. Besides, ... | <urn:uuid:2680c817-b031-49d8-9a86-155271c4f59d> | 2.875 | 214 | Truncated | Science & Tech. | 47.467045 |
There are three main groups of meteorite. They differ in the amount of iron-nickel metal they contain.
Each group of meteorites is split into many more classes and types depending on the minerals they contain, their chemistry and their structure.
Most iron meteorites are thought to be the cores of asteroids that melted... | <urn:uuid:a4416017-fc55-47f3-aaf0-d39e2a97d626> | 3.609375 | 142 | Knowledge Article | Science & Tech. | 32.696055 |
First of all, im daison 21y/o from Philippines.
Before diving into PHP, you must learn the basics, because you can't create a content without HTML and CSS
You can learn HTML here.
After learning HTML, combine it with CSS
, CSS is like in reality a "tools/paint" that you need to hold to design a certain walls or buildin... | <urn:uuid:46b0aa57-4be1-4ff8-b2c9-3dc94a245f38> | 2.796875 | 255 | Comment Section | Software Dev. | 73.276588 |
, Quantifying Seasonal Air-Sea Gas Exchange Processes Using Noble Gas Time-Series: A Design Experiment
, Journal of Marine Research, 2006|
A multi-year time-series of measurements of five noble gases (He, Ne, Ar, Kr, and Xe) at a subtropical ocean location may allow quantification of air-sea gas exchange parameters wit... | <urn:uuid:e08b193c-0f77-4be7-a7f7-8d126a22c0fe> | 2.765625 | 391 | Academic Writing | Science & Tech. | 20.565473 |
The presence of neutrons in atomic nuclei accounts for the occurrence of isotopes— samples of an elementA substance containing only one kind of atom and that therefore cannot be broken down into component substances by chemical means. whose atomsThe smallest particle of an element that can be involved in chemical combi... | <urn:uuid:6c263d3d-58c6-4558-bbbd-ccfe902238c2> | 4.09375 | 636 | Knowledge Article | Science & Tech. | 37.608511 |
Many plant populations fluctuate between years of high and low seed production. These fluctuations, often called mast-seeding, have typically been attributed to fluctuations in resource availability.
Recent theoretical models show that mast-seeding could also be due to the dynamics of resource allocation within individ... | <urn:uuid:79d88bd0-c8e7-42c7-aa6b-6e3bbdfd23d2> | 2.96875 | 252 | Academic Writing | Science & Tech. | 29.234424 |
Refraction is the act of preventing a rule from firing multiple times in succession. Without refraction, at each loop iteration the same rules can be added to the agenda repeatedly. This is because the same conditions are satisfied. To prevent a single rule from firing repeatedly, a refraction condition is implemented.... | <urn:uuid:35c5f35c-5c6a-4484-93a4-4f2a7d5bff0e> | 3 | 178 | Knowledge Article | Software Dev. | 37.618774 |
There are many geometries of galaxies including the spiral galaxy characteristic of our own Milky Way. In the remarkable deep space photograph made by the Hubble Space Telescope, every visible object except for the foreground stars is another galaxy. The image is a composite of 342 images taken over a period of 10 days... | <urn:uuid:47d2cd93-4cca-4214-9bef-45dee162c83a> | 3.15625 | 149 | Knowledge Article | Science & Tech. | 43.126667 |
Algebraic Rules and Graphing
Rules for Working with Logarithms
The rules for working with logarithms are relatively straight-forward and follow from the definition of the logarithmic function.
The rules for logarithmic operations that you need to be familiar with are as follows:
b) = Log(a) + Log(b)
Log(a ÷ b ) = Log(a... | <urn:uuid:ffd5bcee-5652-4937-a8ce-c67721c24ccd> | 4.125 | 1,219 | Tutorial | Science & Tech. | 80.179248 |
- (latitude, longitude) points $P_1, P_2,\ldots, P_n$.
- Presumably, all the points should form a dense cloud. However, noise is possible.
- The virtual center of the points.
For instance, 99% of the points may lie within a circle with 1km radius, except for 1% scattered outside that circle at a distance larger than 1k... | <urn:uuid:641f8b14-11cd-46b8-a1a8-6274714c9375> | 2.828125 | 345 | Q&A Forum | Science & Tech. | 63.975163 |
On This Page
Overview and Description
A codepage is a list of selected character codes characters represented as code points) in a certain order. Codepages are usually defined to support specific languages or groups of languages that share common writing systems. All Window codepages can only contain 256 code points. M... | <urn:uuid:157fcc43-7a09-43ec-b8aa-667919d73d64> | 3.703125 | 3,148 | Documentation | Software Dev. | 38.919807 |
Physics, a branch of science, is the study of forces and their impacts on the environment. Modern physics connects ideas together about the laws of symmetry and conservation (energy, momentum, charge, and parity). The word physics comes from the Greek word ἡ φύσις "nature".
What is physics? [change]
Physics is the stud... | <urn:uuid:d8eb1a03-d5bb-4766-b30d-c0634e0baa2d> | 3.609375 | 2,464 | Knowledge Article | Science & Tech. | 38.64656 |
Science subject and location tags
Articles, documents and multimedia from ABC Science
Wednesday, 1 September 2010 17
Scribbly Gum Nature Feature You know it's spring when you're woken in the early hours of the morning by the deafening calls of channel-billed cuckoos looking for love.
Wednesday, 14 April 2010
The fairyt... | <urn:uuid:5d3a44e9-1ce0-4919-a5b4-20bbaeb42d59> | 2.890625 | 660 | Content Listing | Science & Tech. | 34.280034 |
WHAT CAUSES EARTHQUAKES? An earthquake is the result of a sudden release of stored energy in the Earth's crust triggered by shifting tectonic plates. The Earth's lithosphere is an elaborate network of interconnected plates that move constantly -- far too slow for us to be aware of them, but moving, nonetheless. Occasio... | <urn:uuid:4eb49a15-a753-43d7-87dd-a0d2f69ffa80> | 4.28125 | 411 | Knowledge Article | Science & Tech. | 57.144725 |
FIGURE S2. Southern Hemisphere
height-longitude sections at 60°S for height anomalies (contour) and
temperature anomalies (shaded). Positive values are indicated by solid
contours and dark shading, while negative anomalies are indicated by
dashed contours and light shading. Contour interval for height
anomalies is 60 m... | <urn:uuid:965103a0-be4e-41dd-8123-56b1c56adb21> | 3.21875 | 99 | Knowledge Article | Science & Tech. | 29.646154 |
Carbon dioxide is an important gas in lakes. Although highly soluble in water, most carbon dixide in lakes is formed as an end product of respiration. As carbon dioxide dissolves in water, it form a series of compounds, including carbonic acid, bicarbonate and carbonate. The resulting carbonate chemistry, along with co... | <urn:uuid:2d3a3040-92fc-4302-ac12-6bdbc7ccc3a3> | 3.78125 | 545 | Knowledge Article | Science & Tech. | 31.939196 |
The echinoderms - meaning spiny skin - are the starfish, sea urchins and sea cucumbers.
Starfish like the Bloody henry starfish and the Common starfish which live in our waters are predators that move across the seabed using special organs called tube feet.
Visible spines on the outside of urchins and on the skin of st... | <urn:uuid:65a56a64-2dd6-4f5c-8fec-d0080edcdbdc> | 3.265625 | 134 | Knowledge Article | Science & Tech. | 44.263099 |
New technique for determining the optical constants ...
|Title||New technique for determining the optical constants of liquids|
|Author(s)||C. Keefe, J. Pearson|
|Abstract||The traditional techniques of transmission and attenuated total reflectance (ATR) spectroscopy for determining the optical constants of liquids are... | <urn:uuid:06dcb769-6989-4a32-8a5c-c9676a251f19> | 2.75 | 194 | Truncated | Science & Tech. | 31.116606 |
This image shows the nucleus of comet Tempel 1 and the nucleus of comet Hartley 2. (The comets are placed next to each other for comparison; they are nowhere near each other in space.) As you can see, comets come in all shapes and sizes.
Tempel 1 is five times larger than Hartley 2. Jets are easily seen coming off Hart... | <urn:uuid:4b7a70e9-a5be-47ac-a68e-114ecd6c49f4> | 3.578125 | 178 | Knowledge Article | Science & Tech. | 71.263029 |
Look up monthly U.S., Statewide, Divisional, and Regional Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Utah Temperatu... | <urn:uuid:4c523509-ce33-41ae-a201-818b0e9ad729> | 2.75 | 133 | Structured Data | Science & Tech. | 50.631579 |
The human brain may be the most complex object in the universe, but its construction mostly depends on one thing: the shape of neurons.
Different kinds of neuron are selective about which other neurons they connect to and where they attach. Specific signalling chemicals are thought to be vital in guiding this process.
... | <urn:uuid:613aca83-b805-4163-8991-a77ed01af466> | 3.484375 | 438 | Truncated | Science & Tech. | 52.265 |
Flip between macro and nanoscale images of familiar objects to learn about ways that nanotechnology is inspired by nature, surprising properties at the nanoscale, and new applications in nanotechnology. Includes print your own cards.
"Exploring Structures - Butterfly" is a hands-on activity in which visitors investigat... | <urn:uuid:84fed084-5bd3-4313-9538-eed7a9fa8ab4> | 3.3125 | 470 | Content Listing | Science & Tech. | 25.476477 |
The impact of drought on tree water use was investigated in remnant forest in the Liverpool Plains NSW. Tree water use was measured using commercial sap flow testers from December 2002 to September 2004 which corresponded with a period of drought and a period of higher rainfall. Understorey evapotranspiration and soil ... | <urn:uuid:ff4f18b0-3468-4135-a7bf-f7c6ad0f3478> | 2.921875 | 205 | Academic Writing | Science & Tech. | 25.796325 |
- The construction of the Death Star has been estimated to cost more than $850,000,000,000,000,000. We're working hard to reduce the deficit, not expand it.
- The Administration does not support blowing up planets.
- Why would we spend countless taxpayer dollars on a Death Star with a fundamental flaw that can be explo... | <urn:uuid:01a5c7f0-a5f5-4462-aa3b-c4e1d257d813> | 2.75 | 373 | Truncated | Science & Tech. | 49.145441 |
|San José State University|
& Tornado Alley
Four-Nucleon Combinations to Alpha Nuclides
Nuclei are thought of as being composed of protons and neutrons. Their binding energies are computed in terms of the deficit of their masses compared to the masses of the constituent protons and neutrons. However there is a good dea... | <urn:uuid:3313b181-159f-4030-863e-b4b936a0c2fe> | 3.3125 | 972 | Knowledge Article | Science & Tech. | 43.387713 |
Artist's concept of the Dawn spacecraft with Vesta and Ceres.
Dawn, part of NASA's Discovery Program of competitively selected missions, was launched in 2007 to orbit the large asteroid Vesta and the dwarf planet Ceres. The two bodies have very different properties from each other. By observing them both with the same ... | <urn:uuid:eb169ac5-2d28-42d8-be6c-b56cfdb0012b> | 2.96875 | 206 | Knowledge Article | Science & Tech. | 27.74 |
reveals hydrological response of the cave to extreme rainfall events in the Midwest, USA. Cave-flooding events
are identified within the two samples by the presence of detrital layers composed of clay sized particles.
Comparison with instrumental records of precipitation demonstrates a strong correlation between these
... | <urn:uuid:f62bf682-5a6e-490c-b7b5-8cba1abe751c> | 3 | 240 | Comment Section | Science & Tech. | 33.288942 |
This picture shows the oil slick off the coast of Louisiana. NASA's Aqua satellite took the picture on April 25, 2010.
Click on image for full size
Image courtesy of NASA/MODIS.
Huge Oil Spill in Gulf of Mexico
A large oil drilling rig in the Gulf of Mexico caught fire and sank in April 2010. Eleven workers were killed... | <urn:uuid:e36697b3-3a40-43ef-bfd4-377fec33109f> | 2.921875 | 586 | Content Listing | Science & Tech. | 55.245235 |
The official kilogram. Credit: BIPM
By Margaret Harris
Pick the correct definition of a kilogram:
a) the mass of a body with a de Broglie wavelength of 6.626069311 x 10^-34 m at a velocity of 1 m/s
b) a mass of a body at rest such that Planck’s constant h is 6.626069311 x 10^-34 Js
c) a mass of exactly 5.0184512725 x 1... | <urn:uuid:0c2e30ff-3b83-4030-ac2c-c95e0197aed9> | 3.28125 | 457 | Nonfiction Writing | Science & Tech. | 54.193256 |
Table of contents
Electron configuration describes the distribution of electrons among different orbitals (including shells and subshells) within atoms and molecules.
There are four principle orbitals (s, p, d, and f) which are filled according to the energy level and valence electrons of the element. All four orbitals... | <urn:uuid:38b59f8f-b162-420b-8920-06cf3572c87b> | 4.125 | 1,812 | Documentation | Science & Tech. | 52.961924 |
Molecular Biology and Genetics
Statistics of barcoding coverage
|Specimen Records:||10||Public Records:||2|
|Specimens with Sequences:||6||Public Species:||1|
|Specimens with Barcodes:||6||Public BINs:||1|
|Species With Barcodes:||2|
Geographic range
They are moderately sized lizards with laterally compressed bodies, ... | <urn:uuid:356e43f4-11c3-49d9-9801-53066c085e22> | 2.953125 | 606 | Knowledge Article | Science & Tech. | 55.298403 |
Creationists often like to claim that complex traits cannot arise from the "simple" processes of mutation and selection. They often claim that these processed are not even observable (even though we've been observing them since we began breeding plants and animals).
used evolution to make ROBOTS.
And not just any robot... | <urn:uuid:a08995ce-1b83-4e8c-a6cb-040f04347d2e> | 3.796875 | 485 | Personal Blog | Science & Tech. | 39.082267 |
Given the equation =0, find the values of k such that one root of the equation is less than 1; another root is in the interval (1, 4); and the third root is greater than 4.
[Problem submitted by Steve Lee, LACC Professor of Mathematics.]
Solution for Problem 7:
Let f(x)= , then a rough sketch of the graph of f(x) is th... | <urn:uuid:28460343-c494-4060-806d-a47516ee6ebb> | 3.15625 | 98 | Q&A Forum | Science & Tech. | 87.515 |
Can anybody help with these please?!
Solve this problem by writing an equation. The length of a rectanglar room is 6.2m and the width is 3.3m. What is its area?
Express this problem as an equation. The length of a rectangular car park is a 128m and the width is 63m. What is its area?
Write the rule for finding the area... | <urn:uuid:9aa435a8-d5a7-4b02-8200-e584b99c7833> | 3.078125 | 123 | Q&A Forum | Science & Tech. | 88.42025 |
Sea ice in the Arctic continues to track significantly below average, with the 2nd to lowest readings for the month (depending on the day) in the modern era. Weather conditions around Antarctica caused a temporary stall in sea ice freezing, causing extent conditions to tack toward below average conditions before recent... | <urn:uuid:4b661730-5ae6-4f4a-b85f-a5baae771ffb> | 3.109375 | 469 | Personal Blog | Science & Tech. | 50.232805 |
They flipped the switch, the proton’s flew, and the world hasn’t blown up, yet.
Three hundred feet underground on the French-Swiss border, the biggest physics experiment in history launched yesterday. The Large Hadron Collider.
The biggest atom smasher ever built: a seventeen-mile collision track, and sky-high hopes fo... | <urn:uuid:ce4af507-4afe-4e38-baed-22ae65630a10> | 2.796875 | 423 | Truncated | Science & Tech. | 56.014623 |
18.104.22.168 Ionization Techniques for Volatile Analytes Entering the MS from a GC
22.214.171.124b Chemical Ionization (CI):
Today, most mass spectrometers can perform both electron ionization and chemical ionization, with different interchangeable ionization units. The CI unit is less open to diffusion of the reagent... | <urn:uuid:f4308fed-f7a5-4a5c-8b48-1a410fe54c56> | 2.9375 | 1,212 | Academic Writing | Science & Tech. | 38.892452 |
I am not in favor of total digital enhancement of photographic images. Too much room for human bias. Disclaimers must be issued when a photo is enhanced.
"Old Moon Images Get Modern Makeover"
March 31st, 2009
March 31st, 2009
WOODLANDS, Texas — Images of the moon gleaned from NASA spacecraft more than 40 years ago are ... | <urn:uuid:02d506e3-33b4-47b6-a9cb-e30f498b9ded> | 2.78125 | 1,007 | Personal Blog | Science & Tech. | 45.984009 |
I will discuss in this articel the trigonometric properties of triangles.
Triangles have unque trigonometric properties just like other geometrical figures. The inside circle of a triangle is constructed by bisecting the triangle angles and then taking the perpendicular distance from the three bisectors and drawing the... | <urn:uuid:08925a88-e253-43e3-9fd2-38899825aa42> | 3.953125 | 1,000 | Academic Writing | Science & Tech. | 85.23734 |
In this article we will be seeing how to add a polygon on top of the Silverlight
Article for creating
Silverlight Bing Map Control. MapPolygon:
The MapPolygon class accepts a list of points that define its shape and location
on the map.
MapPolygon class is used to represent a polygon on the map. Namespace: Microsoft.Ma... | <urn:uuid:38a75bdd-c0ba-4066-8912-92fa6ab817bc> | 2.71875 | 189 | Tutorial | Software Dev. | 54.983182 |
The image below is an artist's conception of the surface of the
10 Myr-old star TW Hydrae (TW Hya). This young star is surrounded by
a disk of gas and dust (the dull orange ring-like structure at the
edge of the frame). Material from the inner edge of the disk rains
onto the stellar surface, as indicated by the white, ... | <urn:uuid:34de001c-6d52-466f-a245-a6f28d45f914> | 3.328125 | 215 | Knowledge Article | Science & Tech. | 55.276335 |
The land snail Cepaea nemoralis is highly polymorphic for shell colour and banding (Figure 1). Within and between populations individuals can display a shell colour of several shades of yellow, pink, or brown, and any number of bands from 0 to 5. Generally C. nemoralis populations are monomorphic for lip colour, with t... | <urn:uuid:03110a61-f837-4571-b4b9-f5da8d6b4954> | 3.453125 | 1,916 | Academic Writing | Science & Tech. | 54.143768 |
Experiment of the Week -#199 Blowing Out a Candle
Since it is mid-December, it is time once again for me to read Michael
Faraday's Chemical History of a Candle. This wonderful book is one of
best of his Christmas lectures for children and it is still in print
years later. If you have never read this book, I highly reco... | <urn:uuid:b95f7bba-93e9-4cfa-bc18-fdf1f86703aa> | 3.640625 | 960 | Personal Blog | Science & Tech. | 75.892206 |
From landfills and laboratories to archeological digs and deep space
The Columbus Dispatch - November 14, 2011 02:05 PM
I always knew that the ash tree standing behind my Westerville home was an endangered species.
As the Dispatch's environment and science reporter, I've written stories for more than five years now abo... | <urn:uuid:889067f0-dcf3-49de-bd9d-0fe3dc1b1a73> | 2.6875 | 406 | Personal Blog | Science & Tech. | 59.5757 |
Professionally, I develop primarily in Ada. When I do get a chance to program in C++, I miss some of the features that Ada provides. Ranged types is one of these features. Ada allows the programmer to constrain a numerical type to a particular range. Intermediate expression results are allowed to exceed the range, but ... | <urn:uuid:d8537a77-fcde-4dc3-95b0-1fd00ee9469d> | 3 | 766 | Documentation | Software Dev. | 43.957135 |
Bang!: How is the Energy of Seismic P-Waves Transmitted Through the Earth?
How is the energy of seismic P-waves transmitted through the earth?
- Masking tape
- 5 marbles
- Cut 5 pieces of string, each 12 inches (30 cm) long.
- Tape one piece of string to each of the marbles.
- Tape the free end of each string to the ed... | <urn:uuid:b96d8163-a062-4a92-9b86-861d70ed7862> | 4.1875 | 827 | Tutorial | Science & Tech. | 57.861235 |
Australia State of the Environment Report 2001 (Theme Report)
Prepared by: Ann Hamblin, Bureau of Rural Sciences, Authors
Published by CSIRO on behalf of the Department of the Environment and Heritage, 2001
ISBN 0 643 06748 5
Accelerated erosion and loss of surface soil (continued)
Active gullying and sheet erosion cat... | <urn:uuid:1f424c64-5657-410a-b166-ca5f0fef943b> | 3.40625 | 1,862 | Academic Writing | Science & Tech. | 40.003041 |
Communications satellites orbit directly over the poles, how does this help it to do it's job? And for a weather satellite directly orbiting over the equator?
Not all communications satellites orbit over the poles. Some are in geostationary orbits like the GOES weather satellites. Satellites that need to "see" all part... | <urn:uuid:d8b0377e-c146-4c7b-97f9-0f9c1e185f6d> | 3 | 132 | Q&A Forum | Science & Tech. | 44.515754 |
The style elements provide a straightforward way to control the font. These elements fall into two categories: physical styles and logical styles. The style elements provide only crude control over the appearance of your text. For more sophisticated techniques, refer to “Font Control”.
A logical style indicates that th... | <urn:uuid:43a79858-55b9-4581-bc18-82e30cdc7392> | 3.53125 | 1,580 | Documentation | Software Dev. | 52.590253 |
Introductionearthquake, trembling or shaking movement of the earth's surface. Most earthquakes are minor tremors. Larger earthquakes usually begin with slight tremors but rapidly take the form of one or more violent shocks, and end in vibrations of gradually diminishing force called aftershocks. The subterranean point ... | <urn:uuid:a84214bb-3732-4ef9-8d1e-2e86d499bf4f> | 3.890625 | 161 | Knowledge Article | Science & Tech. | 28.275 |
The Life and Death of Planet Earth by Peter Ward and Donald Brownlee, Times Books/Henry Holt, $25, ISBN 1591020638
TWO phrases spring to mind when you read this book: "you never had it so good" and "the end of the world is nigh". These pessimistic and doom-provoking thoughts echo continuously throughout this riveting r... | <urn:uuid:11eb2173-ed0a-475d-8d18-26e0d96e24c9> | 2.875 | 233 | Truncated | Science & Tech. | 52.490698 |
Same velocity means same
acceleration for two objects.
Two cars are set to drag race. The two cars are driven by
Dastardly Dave and Honest Abe. Dastardly Dave jumps the flag and
starts at t = 0 s, accelerating at a constant rate. One second later
Honest Abe starts, accelerating at a constant rate. At t = 4 s, they
both... | <urn:uuid:260ac3d0-0755-4a7e-87ad-1c71151a757c> | 3 | 208 | Tutorial | Science & Tech. | 62.876316 |
Waves, Sound and Light: Sound and Music
Sound and Music: Audio Guided Solution
Olivia and Mason are doing a lab which involves stretching an elastic cord between two poles which are 98 cm apart. They use a mechanical oscillator to force the cord to vibrate with the third harmonic wave pattern when the frequency is 84 H... | <urn:uuid:f227162e-353f-41a7-9999-ac0c82a8c569> | 3.984375 | 276 | Tutorial | Science & Tech. | 50.541588 |
This sounds like it is an excellent science fair project idea. Doing a carefully controlled experiment on a basic procedure that many scientists use for their research is definitely a worthwhile idea. Progress in science is made one experiment at a time, so I would encourage you to continue.
The Wikipedia article inclu... | <urn:uuid:08e291f7-0b14-4747-857b-7ed051a4b801> | 3.1875 | 452 | Comment Section | Science & Tech. | 60.543042 |
All posts tagged ‘x-rays’
Hidden Blades, Glowing Scorpions and Bug Genitalia: Great Science Images From the American Museum of Natural History
New high-speed videos show us what we already knew: Dogs make a giant mess at the water bowl.
But the clips above and below, filmed in X-ray and visible light, challenge asserti... | <urn:uuid:5decd011-3f7a-42d0-920e-a82a6df0223f> | 2.828125 | 1,104 | Content Listing | Science & Tech. | 45.950206 |
Hello Space Fans, welcome to another addition of Space Fan News.
So the big news this week came out on Monday with the announcement of the confirmation of Kepler-22b, a roughly Earth-sized planet around the habitable zone of a star a lot like the Sun.
I posted a video about this on Tuesday called "The Promise of Kepler... | <urn:uuid:1e5e1978-8ad0-4632-9592-23c74781d4ad> | 3.078125 | 1,699 | Personal Blog | Science & Tech. | 55.103395 |
Answer: I would guess that over the course of a day and a half, evaporation caused the fluid in the straw to become less dense. Diet soda is less dense than water, and as the water evaporated out of the straw, leaving more concentrated diet soda behind, it would become even less dense than usual. The fluid in the cup w... | <urn:uuid:8fc03081-202e-4c3e-8460-091a089e3cc2> | 3.078125 | 195 | Q&A Forum | Science & Tech. | 42.452583 |
Arthropods are a large group of animals distinguished by having a chitinous, segmented exoskeleton (outer skeleton) and jointed appendages. Examples of arthropods found in the Pacific Northwest include:
1. Insects: Characterized by 3 pairs of jointed legs and body divided into 3 major segments. Frequently one may see o... | <urn:uuid:ff34d4dd-b82b-4d53-80ab-3fcf9b6bbbc5> | 3.546875 | 317 | Knowledge Article | Science & Tech. | 50.870371 |
Taken from Mars Robotics Lesson Background
Robots: Machines On the Move
The first known use of the term "robot" was by Czech playwright Karel Capek, who in 1920 wrote a play called R.U.R.: Rossum's Universal Robots. Capek used the Czech word "robot," which means "worker" or "laborer," to describe the mechanical slaves ... | <urn:uuid:ceaa2210-1019-4352-b1ff-4aca2ff3e84b> | 3.484375 | 3,120 | Knowledge Article | Science & Tech. | 38.452339 |
ansible basic operating theory explained
Talking on irc tonight pointed out a lacking in the docs of ansible. Specifically, explaining the dirt-simple nature of how it works.
0. ansible has modules – modules are just executable code/scripts in any language you want – there are only 2 requirements:
a. that whatever lang... | <urn:uuid:74cf9d10-c792-4b51-a113-91f38f9f21c6> | 3.046875 | 490 | Comment Section | Software Dev. | 63.252843 |
Science Fair Project Encyclopedia
Prumnopitys is a genus of conifers belonging to the Podocarp family, Podocarpaceae. The eight recognized species of Prumnopitys densely-branched, dioecious evergreen trees up to 40 metres in height. The leaves are similar to those of the yew, strap-shaped, 1-4 cm long and 2-3 mm broad,... | <urn:uuid:f562d0f9-935f-4f54-a0e5-6417503a8a86> | 3.359375 | 556 | Knowledge Article | Science & Tech. | 52.119266 |
|This shock wave
plows through space at over 500,000 kilometers per hour.
Moving toward to bottom of this
detailed color composite, the thin, braided filaments are actually
long ripples in a sheet of glowing gas seen almost edge on.
as NGC 2736, its narrow
suggests its popular name,
the Pencil Nebula.
About 5 light-yea... | <urn:uuid:ffdb9d3b-01f9-4e8c-a5f4-be17a64d3719> | 3.40625 | 171 | Knowledge Article | Science & Tech. | 55.862443 |
Hubble’s constantArticle Free Pass
Hubble’s constant, in cosmology, constant of proportionality in the relation between the velocities of remote galaxies and their distances. It expresses the rate at which the universe is expanding. It is denoted by the symbol H0, where the subscript denotes that the value is measured ... | <urn:uuid:6a75ed3d-e3ce-46c2-af6c-4d36e7faf25a> | 3.921875 | 333 | Knowledge Article | Science & Tech. | 51.605294 |
Each rational number can be written in infinitely many forms, for example 3 / 6 = 2 / 4 = 1 / 2. The simplest form is when a and b have no common divisors, and every non-zero rational number has exactly one simplest form of this type with positive denominator.
The decimal expansion of a rational number is eventually pe... | <urn:uuid:f1d8c476-afb2-4e0d-9560-95ae16af7a80> | 3.84375 | 1,084 | Knowledge Article | Science & Tech. | 39.98552 |
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Proteins, Amino Acid, Peptide, Peptide bond, Polypeptide??? IM CONFUSED?
... | <urn:uuid:b365ee4c-ac1a-43ba-8d03-22c7f6dc6000> | 2.8125 | 706 | Comment Section | Science & Tech. | 55.84189 |
THE CASE OF THE FUEHRER'S TUNIC
The Evidence: Some years ago, a collector in San Diego, California, paid top dollar for a Nazi tunic whose label stated that it had belonged to Adolf Hitler. Then, concerned about its authenticity, he asked Palenik to examine it.
The Science: Palenik removed two kinds of fiber from the l... | <urn:uuid:3faa7b35-05f1-4603-a734-f7a2d1623767> | 2.9375 | 239 | Truncated | Science & Tech. | 41.722365 |