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Chemists who study the earth by analyzing its minerals,
rocks, the crust, salts and other lithospheric properties. They use reactions
such as chemical weathering, dissolution, hydration, dehydration, oxidation to
explore the relationship between chemical processes and reactions with the
atmosphere and hydrosphere.
[Env... | <urn:uuid:13ff63e2-efab-4cf6-931b-6e738f1e65a8> | 2.921875 | 125 | Knowledge Article | Science & Tech. | 38.200556 |
No. I'm not making that up. It's what the article says. Really:
sulfur is commonly known to have a standard atomic weight of 32.065. However, its actual atomic weight can be anywhere between 32.059 and 32.076, depending on where the element is found. (Emphasis added)Oh wait.... they're talking about "weight". Not mass.... | <urn:uuid:9238e5a7-44ad-4a56-9750-7f1f1a475035> | 3.140625 | 239 | Personal Blog | Science & Tech. | 78.706381 |
The Early History of Seismometry (to 1900)
James Dewey and Perry Byerly
The Tilt Controversy
For a seismograph to be effective, its response characteristics must be known. We have seen that the British seismologists in Japan attempted to simplify the problem of the seismograph response by building relatively long-perio... | <urn:uuid:d020d1af-fea4-432c-83e3-e2004534103b> | 3.875 | 1,918 | Academic Writing | Science & Tech. | 32.065954 |
The influence of Great Earthquakes on volcanic eruption rate along the Chilean subduction zone
Watt, Sebastian F.L., Pyle, David M. and Mather, Tamsin A. (2009) The influence of Great Earthquakes on volcanic eruption rate along the Chilean subduction zone. Earth and Planetary Science Letters, 277, (3-4), 399-407. (doi:... | <urn:uuid:234e2040-2a7d-4d83-bd3f-21b05c90bb67> | 3.078125 | 495 | Academic Writing | Science & Tech. | 48.927759 |
Soil Changes Over Time Within a Dry Meadow, Long Term Soil Organic Matter Study, RussiaEntry ID: RAS.SCG.DryMeadow
Abstract: This experiment began in 1965. The present cutting meadow was formed
on land that was ploughed in 1890-1900, then used only for hay harvest
without any treatment. The soil at the site developed o... | <urn:uuid:d9cafd2f-c4db-4c42-bcbf-0c51d3f70c8d> | 3.0625 | 2,006 | Academic Writing | Science & Tech. | 36.834163 |
This tiny pond creature has 15,600 chromosomes. From Ed Yong:
Within its cell, Oxytricha contains two nuclei, which enclose its DNA. One of these—the micronucleus— contains the complete edition of Oxytricha’s genome, just like the single nucleus within our own cells. That’s the tidy encyclopaedia shelf. But while the m... | <urn:uuid:6f23eab9-3dce-4dc8-82c5-d324e76dbdde> | 3 | 362 | Truncated | Science & Tech. | 50.244118 |
When I was at school I learned about "implicit coordinates" for curves in a plane. Essentially these mapped the path in terms of arc length $s$ from a fixed point, and direction of travel $\psi$ measured against a fixed line (so the curve has to be sufficiently smooth). The point was that these data could be measured b... | <urn:uuid:0642d5c2-106a-47f6-959a-3dcde60583d3> | 2.875 | 303 | Q&A Forum | Science & Tech. | 48.462018 |
Salpingoeca cells appear as sessile, thecate trophic cells and naked, free-swimming or creeping zoospores.
Trophic cells are roughly spherical, and reside in a theca (labelled "lorica" in the illustrations) that may or may not have a stipe. The theca, which is visible by light microscopy, is the main diagnostic charact... | <urn:uuid:9391157b-cdf9-49e5-9ca4-791faeb78b7a> | 3.46875 | 296 | Knowledge Article | Science & Tech. | 23.40991 |
Ten squares form regular rings either with adjacent or opposite
vertices touching. Calculate the inner and outer radii of the rings
that surround the squares.
One side of a triangle is divided into segments of length a and b
by the inscribed circle, with radius r. Prove that the area is:
Find the exact values of some t... | <urn:uuid:746d0f14-1071-4730-85da-5824a605ea10> | 3.859375 | 93 | Tutorial | Science & Tech. | 56.424219 |
Lets say I want to design a Nomarski prism that would split the ordinary and extraordinary beam by an angle of 0.32 mrad. I used a raytracer to find the internal angle between the quartz wedges.
However I couldn't decide how thick the quartz wedges should be.
The original patent mentions the thickness but I don't under... | <urn:uuid:2a3605cf-e5e5-45c7-b732-25488c64c856> | 3.296875 | 375 | Q&A Forum | Science & Tech. | 69.747882 |
The area of smashing particles is surrounded by detectors. Whatever is captured by detectors is a particle (I would say "by definition" for simplicity). It causes some reaction inside detector. For instance, it can be a trace of bubbles in Wilson camera. The shape and other parameters of this trace depend of the type o... | <urn:uuid:b6f38db0-b5ab-4433-a144-d3e5609d52b3> | 3.109375 | 611 | Q&A Forum | Science & Tech. | 44.825113 |
There is considerable disagreement as to the proper grouping and status of divisions within this heterogeneous assemblage of organisms, some of which, as indicated below, are animal in nature. As a matter of convenience in discussing the more important marine members, we shall here employ only names of more or less fam... | <urn:uuid:fd0d8c1d-3fbd-4fa6-97fd-1cdb89d967df> | 3.140625 | 2,608 | Academic Writing | Science & Tech. | 31.13524 |
Natural Gas Energy
The United States and the rest of the world have a very clear dependency on oil as a source of energy. Drilling for oil, however, sometimes has unexpected consequences. Natural gas is one of the main byproducts of drilling for oil (Taylor, 2009). At this point, oil companies do not do anything with t... | <urn:uuid:b0bc4a6d-9810-4bb2-aea9-b1a9bc9a43be> | 3.4375 | 320 | Knowledge Article | Science & Tech. | 52.710147 |
There are an estimated 1.618 million web sites dedicated to recreational mathematics. Many of them feature interesting and useful material, but there is mammoth duplication of content. I strongly desire not to contribute to the clutter, hoping to offer perspectives sufficiently unique that they will not be encountered ... | <urn:uuid:a2213b54-cdfe-48d5-83c4-086be7f76c9b> | 2.796875 | 130 | Personal Blog | Science & Tech. | 20.015833 |
In general if A, B and C are the three components of a
vector (so F = <A, B, C>, then the curl is the
curl(F) = <dC/dy - dB/dz, dA/dz - dC/dx, dB/dx - dA/dy>
where dC/dy is the derivative of C with respect to y, and so on.
Here all derivatives are zero except dA/dy, dB/dx and dC/dx. You should be able to figure out the... | <urn:uuid:fcd1fb77-8225-41c4-a119-6fc0deb32cec> | 2.734375 | 210 | Q&A Forum | Science & Tech. | 78.778571 |
Nowadays, the determination of the humidity of air in the atmosphere is done on a global scale by satellite measurements.
But of course the technique of humidity measurements did not start in space.
The first measurements were performed on the ground.
These ordinary techniques are still used today as ground-based measu... | <urn:uuid:9c8a7262-07ac-447e-94ca-d4720c91372d> | 3.828125 | 2,073 | Knowledge Article | Science & Tech. | 35.200708 |
In this tutorial, you've looked at the methods available for debugging Perl scripts. You started by looking at the methods used in traditional Perl development environments. In general, these involve the use of either the
print() function and monitoring the output or the use of the standard debugger provided with Perl.... | <urn:uuid:cd6f1ce9-767b-4e1c-8514-904ab1397267> | 3.140625 | 247 | Tutorial | Software Dev. | 31.470186 |
1 [intransitive and transitive]HBMB
if an animal or plant reproduces, or reproduces itself, it produces young plants or animals:
The turtles return to the coast to reproduce.
to make a photograph or printed copy of something:
Klimt's artwork is reproduced in this exquisite book.
to make something happen in the same way... | <urn:uuid:2013e737-5813-416d-b228-06ab0303a2c7> | 3.0625 | 135 | Knowledge Article | Science & Tech. | 36.075663 |
Hydropower, also called "hydraulic power" or "water power," is energy that is derived from harnessing the force of moving water. It is often used for irrigation, the operation of machines and commercial electricity production, through the use of dams or tidal, wave or ocean power schemes.
U.S. natural gas prices are ri... | <urn:uuid:7b5a5606-ee3c-4bc2-b7e4-c60481c0a925> | 2.9375 | 888 | Content Listing | Science & Tech. | 63.03127 |
The Satanic Leaf-tailed Gecko - First described in 1888 and re-discovered in Madagascar in 1998. It is the smallest of 12 species of nocturnal bizarre looking leaf-tailed geckos. They are only found in primary, undisturbed forests in Madagascar, so their populations are very sensitive to habitat destruction.
ET salaman... | <urn:uuid:25b122ab-2571-48f7-b80f-10736d4aa254> | 3.421875 | 1,239 | Listicle | Science & Tech. | 48.547732 |
Area is a quantity that expresses the extent of a two-dimensional surface or shape in the plane. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimens... | <urn:uuid:f880aa5a-7d89-4343-8e2b-7e36ee7c5850> | 4.03125 | 640 | Knowledge Article | Science & Tech. | 37.113922 |
Elliptic and circular orbits are found for points lying on an ellipse perturbed by Gaussian errors. The Akaike information criterion is then used to judge which of the models is more complex. The controls allow you to change the magnitude of the errors and the shape of the unperturbed curve.
This Demonstration, based o... | <urn:uuid:1fe04f73-a26e-42d3-8fcf-522da5aeb026> | 3.375 | 187 | Documentation | Science & Tech. | 40.267097 |
On Mon, Feb 9, 2009 at 3:41 PM, Steven Buehler wrote:
> Ok, I just saw a post about using view's in mysql. I tried to look it up
> and found how to use it, but my question is: what is a view and why would
> you use it?
The problem with any definition of an object in a database is that
there are multiple definitions. Us... | <urn:uuid:c387aa61-025b-4316-a955-27e16f2e8c74> | 3.21875 | 460 | Comment Section | Software Dev. | 59.758962 |
Jill and Jimmy - Soap Bubbles
Library Home || Primary || Math Fundamentals || Pre-Algebra ||
Algebra || Geometry || Discrete Math || Trig/Calc
|Geometry, difficulty level 3. You're given two spheres with centers 14 cm apart. If the two spheres intersect in a circle whose radius is 12 cm, and the radius of one sphere is... | <urn:uuid:86560cff-78e1-4436-a664-5339a983ab80> | 3.734375 | 156 | Tutorial | Science & Tech. | 49.725873 |
Tag: "hemisphere" at biology news
Wetlands clean selenium from agricultural runoff
...ealthy." Terry noted that the air in the northern hemisphere
already contains about 10,000 metric tons of volatile selenium from volcanoes, soil and plants. "The amount of dimethyl selenide released by wetlands would be negligible in ... | <urn:uuid:df237288-0e95-4b15-8e0b-b1cde99ecc29> | 3.09375 | 1,493 | Content Listing | Science & Tech. | 41.222291 |
Recent headlines have referred to the fact that the arctic ice has melted to a record low and many are using this as evidence to support the theory of global warming.
The earth is tilted on an axis of 23.5 degrees in relation to its orbit of the sun. This means that in winter the sun is below the horizon in Arctic, plu... | <urn:uuid:4aa78f2b-bb53-43a6-a49f-1eb8c0e51ac0> | 3.734375 | 636 | Nonfiction Writing | Science & Tech. | 48.816946 |
Opening the fifth door of our advent calendar, we don’t find a recipe of how to do something cool with Perl 6 – rather an explanation of how some of the intuitiveness of the language works.
As an example, consider these two lines of code:
say 6 / 3; say 'Price: 15 Euro' ~~ /\d+/;
They print out
15, respectively. For a ... | <urn:uuid:30a7cc5e-cc0b-48db-9c83-2a940d5bd9f0> | 4.03125 | 366 | Documentation | Software Dev. | 56.268067 |
I am not sure where these numbers come from and the answer depends on how you encode the genome data and if you define all the redundancy (unnecessary, repetitive data) as "information".
First of all, the humane genome contains somewhere around 3.1 (men) to 3.2 (women) billion base pairs. Since the X chromosome is thre... | <urn:uuid:8b0e2eaa-d207-480f-802f-342ebccb1d6c> | 3 | 415 | Q&A Forum | Science & Tech. | 43.253793 |
Balance of the West Antarctic Ice Sheet
For several decades, measurements of the West Antarctic Ice Sheet showed it to be retreating rapidly. But new data derived from satellite-borne radar sensors show the ice sheet to be growing. Changing Antarctic ice sheets remains an area of high scientific interest, particularly ... | <urn:uuid:2842b7ff-8dc0-4dc6-a57f-484d3677710c> | 4.09375 | 293 | Knowledge Article | Science & Tech. | 40.74 |
The largest, most violent star forming region known in the whole
Local Group of galaxies
lies in our neighboring galaxy the
Large Magellanic Cloud (LMC).
Were the Tarantula Nebula at the distance of the
Orion Nebula -- a local star forming region --
it would take up fully half the sky.
30 Doradus, the red and pink gas ... | <urn:uuid:f5a68c6d-584d-4742-a0ad-680b83724519> | 3.3125 | 185 | Knowledge Article | Science & Tech. | 38.610833 |
Climate change impacts in Australia
Click here for a comprehensive guide to climate change. This CANA presentation explains the science behind climate change and looks at the impacts, Australia's role, and what you can do.
The CSIRO and Bureau of Meteorology have released the State of the Climate 2012, showing that tem... | <urn:uuid:2955f1d4-943c-428b-b883-165f66a1d49b> | 3.6875 | 1,579 | Knowledge Article | Science & Tech. | 36.855952 |
|Why Not to Use Aluminum in Your Langmuir Probes|
I have made a fair number of Langmuir probes during the time I have been running experiments for my thesis. Some of the plasma facing material is aluminum, which I used because it was easy enough to machine that I could do it myself. The benefit of being able to do this... | <urn:uuid:4394deeb-3514-4947-abb8-643dd49dd5ba> | 2.8125 | 704 | Personal Blog | Science & Tech. | 49.681776 |
Plant and fungi phenology
Published (reviewed and quality assured)
Justification for indicator selection
Phenology is the timing of seasonal events such as budburst, flowering, dormancy, migration and hibernation. Some phenological responses are triggered by mean temperature, while others are more responsive to day len... | <urn:uuid:183a3a2a-9858-4dee-8044-1a19e82cfeda> | 3.171875 | 1,191 | Structured Data | Science & Tech. | 21.351239 |
The cygwin tools aim to provide a
unix-style API on top of the windows libraries, to facilitate ports of
unix software to windows. To this end, they introduce a unix-style
directory hierarchy under some root directory (typically
everything built against the cygwin API (including the cygwin tools
and programs compiled w... | <urn:uuid:5aca12f6-d8d3-400f-a6d1-769064d90d52> | 2.8125 | 741 | Documentation | Software Dev. | 51.316554 |
Rotation curves of disk galaxies rise steeply in their inner regions and then remain roughly flat out to the last point measured. To explain these observations within the framework of Newtonian gravity, a considerable amount of unseen mass is required.
The idea that unseen matter is needed to account for the rotation v... | <urn:uuid:49e8a0e6-0c85-4cba-b038-5b522e92dc60> | 3.28125 | 2,725 | Academic Writing | Science & Tech. | 52.503037 |
Math.atan --- To Degrees Help
Hi, I've hit a snag. I've got this rather long piece of code that I'm working on, here's the issue area
I'm trying to convert (180/n) to degrees and then take the tangent of it for use in the equation TotalArea. I've been at it for a solid 30 minutes and just can't get it to work. I'm new ... | <urn:uuid:025693dc-9580-4186-ad09-e98077d05372> | 3.109375 | 513 | Comment Section | Software Dev. | 72.728164 |
What is the phenomenon called when light is bent due to
heat (ie those waves you "see" over your bbq grill or behind a jet engine?
The phenomenon is called refraction. This is due to the differences of the
index of refraction due to temperature differences in the air. On a large
scale, you can get a mirage.
There is a ... | <urn:uuid:595466d6-b4f5-4835-8b9a-1aa84d781da8> | 3.515625 | 351 | Q&A Forum | Science & Tech. | 65.19651 |
(PHP 4, PHP 5)
base_convert — Convert a number between arbitrary bases
Returns a string containing number represented in base tobase. The base in which number is given is specified in frombase. Both frombase and tobase have to be between 2 and 36, inclusive. Digits in numbers with a base higher than 10 will be represen... | <urn:uuid:647739be-72cb-4c8a-b08e-031e98620785> | 3.4375 | 223 | Documentation | Software Dev. | 37.64 |
Atomic physics topics related to nuclear power?
View Single Post
Sep19-06, 10:14 AM
Thanks for clearing that up :)
What process is used to separate for instance plutonium from the waste and how efficient is it? Does a substantial ammount of plutonium get left in the waste after extraction? | <urn:uuid:2c816400-2bbd-421d-992f-da64e01393a0> | 2.71875 | 64 | Comment Section | Science & Tech. | 57.942333 |
Secant right-hand side
In geometry, the relative position of two lines, or a line and a Curve, can be qualified by the adjective secant . This one comes from the Latin secare , which means to cross. In mathematical terms, a line is secant on another line, or more generally with a curve, when it has a nonempty intersect... | <urn:uuid:5c1d3944-9490-4602-b004-edb73a3bd037> | 4.09375 | 620 | Knowledge Article | Science & Tech. | 46.270048 |
This animated image shows heat rising in convection currents from the
outer boundary of the core and cooling at the surface.
Cooling History, part 2
The heat of a body has the power to control activity because energy must be transported from the warmest spots to the coolest spots by whatever means is possible. The proc... | <urn:uuid:d8698ae1-cb39-4a90-b8a6-9245ad2c278f> | 4.46875 | 557 | Content Listing | Science & Tech. | 64.32145 |
The Doppler shift is something we are all familiar with. The classic acoustic Doppler shift is observed every time an emergency vehicle goes by with its siren on. When it is approaching the tone sounds higher than when it is receding from us. This is because the sound emitter is moving as it emits and this compresses t... | <urn:uuid:08863c67-c610-4f14-bb09-50025f43da23> | 3.609375 | 678 | Personal Blog | Science & Tech. | 36.223856 |
PORT ANGELES, Wash. — Larry Ward stands on the banks of a gravel-lined channel two miles from the mouth of the Elwha River at what will one day be the point at which adult salmon returning from the ocean come back to spawn, mixing with young smolts on their way out to the open waters.
Ward is the head of the Lower Elwh... | <urn:uuid:d0dbbf21-e7eb-427d-91cf-0eea250ae317> | 2.890625 | 1,337 | Truncated | Science & Tech. | 56.804959 |
7 characteristics of Protists
· It is a single celled organism.
· Some are predators and resemble animals.
· All protists are eukaryotic (have a nucleus).
· Protists are classified by the way they obtain energy.
· Biologists identified about 65,000 different types of protozoa, almost half are extinct species from fossi... | <urn:uuid:4d308768-17a5-4fc5-aee7-8d50f3e14eb3> | 3.578125 | 88 | Listicle | Science & Tech. | 32.445132 |
A chacma baboon.
Célérier et al. (2010) uses mice to assess the relatedness of chacma baboons (Papio ursinus) through olfactory cues. But, why mice you asked?
Human noses are often quite weak compared with the rest of the animal kingdom, making it hard for us to find out if baboons can be told apart by smell. Researche... | <urn:uuid:8437db20-ad14-4ab8-80b5-ad9701b40a9c> | 4 | 332 | Personal Blog | Science & Tech. | 42.858064 |
Avian Demography Unit
Department of Statistical Sciences
University of Cape Town
|BIRD NUMBERS||Volume 10 Number 1, July 2001|
16. Notes on the birds and other animals recorded at the Cunene River mouth from 6-8 January 2001
M.D. Anderson*, R.A. Anderson, S.L. Anderson, T.A. Anderson,
The Cunene River is the third-larg... | <urn:uuid:419f405f-a2b6-4780-b11b-30fb31dc2160> | 3.15625 | 1,680 | Academic Writing | Science & Tech. | 51.119259 |
The aftermath of a cosmic cataclysm,
remnant Cassiopeia A (Cas A) is a
11,000 light-years away.
Light from the Cas A supernova,
the death explosion of a massive star,
first reached Earth just 330 years ago.
Still expanding, the explosion's
debris cloud spans
about 15 light-years near the center of this
scene combines c... | <urn:uuid:435163ac-b016-4f15-9742-b48eb3a55f63> | 3.40625 | 173 | Knowledge Article | Science & Tech. | 49.383288 |
Relentless drought extending toll to wildlife
Heat marks set in Texas, Okla.
CANADIAN, Texas - In a muddy pile of sand where a pond once flowed in the Texas Panhandle, dead fish, their flesh already decayed and feasted on by maggots, lie with their mouths open. Nearby, deer munch on the vegetation equivalent of junk fo... | <urn:uuid:d1943fad-afc5-4c98-86b6-d0ac7da5b05b> | 3.5625 | 1,108 | Truncated | Science & Tech. | 54.309048 |
Scientific notation is used to make extremely large or small numbers more manageable. Numbers written in scientific notation are the products of a digit term and an exponential term and are written in the general form a x 10^n. For example, 0.0000234 is written 2.34 x 10^n and 456,000 is written as 4.56 x 10^5.
So we'r... | <urn:uuid:f0102cbc-627b-47b3-902a-0cf7ecefd3b8> | 4.21875 | 526 | Tutorial | Science & Tech. | 82.818282 |
crown-of-thorns starfishArticle Free Pass
crown-of-thorns starfish, (Acanthaster planci), reddish and heavy-spined species of the phylum Echinodermata. The adult has from 12 to 19 arms, is typically 45 centimetres (18 inches) across, and feeds on coral polyps. Beginning about 1963 it increased enormously on Australia’s... | <urn:uuid:8fdd1991-f885-46a6-8da7-6eac2a42180e> | 3.53125 | 338 | Knowledge Article | Science & Tech. | 37.219752 |
A long straight wire carries a current I
Arectangular wire loop
withits closest edge a distance a
from the wire,
asshown in the figure below. Take a
= 3.5 cm, and
= 6.5 cm.Suppose
the rectangular loop is a conductor
withresistance 45 m
and that the current I
longwire is increasing at the rate of 15 A/s.
Find the induce... | <urn:uuid:2518d505-f8b5-4d94-8990-939ed300c9c5> | 3.3125 | 97 | Q&A Forum | Science & Tech. | 73.897273 |
Herb is a bestselling author and consultant on software development topics, and a software architect at Microsoft. He can be contacted at www.gotw.ca.
What does the volatile keyword mean? How should you use it? Confusingly, there are two common answers, because depending on the language you use volatile supports one or... | <urn:uuid:e4c514eb-e80d-43c9-8fdb-e5c9fc7f1c55> | 3.46875 | 1,571 | Audio Transcript | Software Dev. | 42.094334 |
by Jan Adkins
Meteorologists love hurricanes because they are wonders of nature. But if you're on a ship at sea or in a house on the beach, a hurricane is not so pretty. The screaming winds and enormous waves can overturn a ship. At the shore they can punch out windows, knock down trees, or pluck the roofs from houses.... | <urn:uuid:13a35ed3-d83b-4501-81e0-e2ad60b6f12e> | 3.6875 | 388 | Tutorial | Science & Tech. | 59.015241 |
SESAME (Spin Echo Scattering Angle Measurement)
The newest LENS beamline, dubbed SESAME (Spin Echo Scattering Angle Measurement), measured its first neutrons on April 21, 2009. Started in the summer of 2006, this beamline has been the vision of IU professor Roger Pynn at CEEM. SESAME will use polarized neutrons to prob... | <urn:uuid:bc29b78d-8a7f-4390-9788-137951cf345e> | 3.015625 | 324 | Knowledge Article | Science & Tech. | 26.641246 |
We recommend using at least three classes:
An application class - this will contain your main method and will run the program as well as updating the gui
A board class - this will represent the backend and store the state of the game such as what disks are in what squares
A square/cell/tile class - this represents a si... | <urn:uuid:9d0c792a-c288-4030-81cb-4449ef0a8a83> | 2.859375 | 639 | Tutorial | Software Dev. | 49.637252 |
Assertion are simple check assumption made at the beginning of the program to ensure the program is true throughout provided by the Java language. For example, the range of age should be in between 18 and above; or cannot be more than 50.
These are the set of expression used in java that enables you to check the assump... | <urn:uuid:ad443eb7-7aba-451f-bb79-f9254da9a430> | 3.890625 | 635 | Documentation | Software Dev. | 47.245479 |
It appears easy to understand why there should be a bulge of water, producing a high tide, on the side of the earth facing of the moon. But why is there a bulge on the opposite side as well?
It is obviously not gravity that is doing it but rather, it is the difference in gravitational force across the earth that causes... | <urn:uuid:abc476be-62d5-45ee-891a-aba9c60ff102> | 4.375 | 361 | Knowledge Article | Science & Tech. | 52.485261 |
Around 450 million years ago, shallow seas covered the Cincinnati region and harbored one very large and now very mysterious organism. Despite its size, no one has ever found a fossil of this “monster” until its discovery by an amateur paleontologist last year.
UC Paleontologist David Meyer, left and Carlton Brett, rig... | <urn:uuid:84f13cab-6f59-48a2-9042-18e12dbc6600> | 3.40625 | 337 | Personal Blog | Science & Tech. | 40.595641 |
Comprehensive DescriptionRead full entry
BiologyOccurs in cold brackish and moderately saline water near the coast (Ref. 27547). Enters coastal rivers and may occur as far as 120 miles inland (Ref. 5723). Landlocked in lakes (Ref. 59043). Maximum depth reported at 100m (Ref. 35388). Benthic (Ref. 58426). Movements are ... | <urn:uuid:ffdc360c-aced-4425-b515-506eb5a268d2> | 3.25 | 250 | Knowledge Article | Science & Tech. | 60.325507 |
Appendix A. Photographs of feeding fronts of Oreaster reticulatus and Strongylocentrotus droebachiensis.
FIG. A1. (A) A feeding front of the sea star Oreaster reticulatus off St. Croix, U.S. Virgin Islands. The front is moving from left to right. Feeding mounds (fm) of darker sediment surrounded by lighter halos can be... | <urn:uuid:48ece227-a56b-4928-aa35-c5d081e81659> | 2.765625 | 224 | Truncated | Science & Tech. | 58.3025 |
I am doing some research in electromagnetic induction,
and found the following letter from Faraday that appears to contradict
Lenz's law. I doubt very much that Faraday made a mistake here, but I
have been unable to find a plausible explanation for this incongruity.
Could you please help me elucidate this conundrum?
Mi... | <urn:uuid:b1359f04-187c-41e9-a130-cfda6bae7357> | 2.75 | 1,041 | Q&A Forum | Science & Tech. | 52.654332 |
Velocity and Gravity
Every moving object has a particular velocity, which is a three-dimensional vector. The velocity of an object indicates how quickly it is moving in each direction. For example, a velocity of (3, -2, -5) means that an object is moving 3 units per second in the positive x direction, 2 units per secon... | <urn:uuid:c2454635-aa36-4493-a134-0fe9caee7ec8> | 4.3125 | 198 | Tutorial | Science & Tech. | 58.813636 |
Awash in a sea of
plasma and anchored in
fields, sunspots are planet-sized,
dark islands in
solar photosphere, the bright surface of the Sun.
because they are slightly cooler than the surrounding surface,
this group of sunspots is captured in a close-up
telescopic snapshot from July 11.
The field of view spans nearly 1... | <urn:uuid:841d26ad-161e-413c-803b-6c45844491b5> | 3.265625 | 209 | Knowledge Article | Science & Tech. | 49.7 |
Once & Future Climate, Part 1: The Past
Running Time: 00:31:41
Watch as Exploratorium physicists Paul Doherty and Stephanie Chasteen play around with the leading greenhouse gas: carbon dioxide. What is it? How much is there in our atmosphere? What does it do that is so harmful to the environment?
How Climate Change Imp... | <urn:uuid:d21d1414-e17b-4483-ae46-4c1f31c9af98> | 2.96875 | 1,231 | Content Listing | Science & Tech. | 51.805005 |
-A bicycle wheel
-2 handles for the axle
-Chain or rope suspended from large stand or ceiling
You can perform this experiment in a couple of different ways. Using the first method, you get the bike wheel spinning and then use the eyebolt in the end of the handle to hang the wheel on a hook which is connected to the end... | <urn:uuid:a12354b4-0821-4577-86aa-7c06dc16b7cf> | 3.65625 | 238 | Tutorial | Science & Tech. | 67.355577 |
Question Corner and Discussion Area
Hi. I'm an adult education instructor for SIAST. I'm presently developing multimedia materials in the science area. Part of the program involves showing students how to solve linear equations using a CD ROM format. Does anyone have any suggestions as to how this could be presented us... | <urn:uuid:2761827b-f830-4cbc-998e-5e7213f7c222> | 3.234375 | 519 | Q&A Forum | Science & Tech. | 63.334302 |
Check out our project guide, which talks about how to do a research paper: http://www.sciencebuddies.org/science-f ... ndex.shtml
The guide will walk through through each step of your project. Just look on the left side under "How to Do a Science Fair Project?" and then "Doing Background Research"
For your report, I'd ... | <urn:uuid:22ce0dd3-ed89-41f2-830f-af31fdc67e00> | 3.171875 | 279 | Comment Section | Science & Tech. | 85.37391 |
July 16, 2012 The Atlantic Meridional Overturning Circulation (AMOC), driven by temperature and salinity gradients, is an important component of the climate system; it transfers an enormous amount of heat via ocean currents and atmospheric circulation to high northern latitudes and hence has bearing on climate in the r... | <urn:uuid:2b370b67-c5f5-4db9-bbfc-8ecfeab31d58> | 3.859375 | 488 | Truncated | Science & Tech. | 45.826051 |
FJ is contained in plane R, BC and DE are contained in plane S, and FJ, BC, and DE intersect at A. its hard for me
I dont understand when there's a cirlce and multiple lines crossing what all the rules are for the ratio's of the lines, I remember learning something was one third of something else ? But i dont...
explai... | <urn:uuid:db7d3b73-c218-48bd-8b2b-733efff8996b> | 3.234375 | 602 | Q&A Forum | Science & Tech. | 81.15624 |
The Solar System is remarkably regular, its eight planets orbiting the Sun in the same direction in very nearly circular trajectories. Their orbits lie nearly in the same plane, which is aligned with the Sun's equator. These facts point toward a common origin for the Solar System, where everything collapsed from a sing... | <urn:uuid:fbeff072-2e1b-43db-a4c3-cbd5d4616b89> | 4.15625 | 917 | Knowledge Article | Science & Tech. | 39.066314 |
Millions of years before humans invented sonar, bats and toothed whales had mastered the biological version of the same trick – echolocation. By timing the echoes of their calls, one group effortlessly flies through the darkest of skies and the other swims through the murkiest of waters. It’s amazing enough that two su... | <urn:uuid:727cbd9a-8a88-4bc4-b85e-521a721cac0b> | 3.828125 | 1,050 | Nonfiction Writing | Science & Tech. | 38.563424 |
First of all, the 1976 Viking lander did NOT find organics on Mars. This is not just because the mass-spectrometer they flew was 3 orders of magnitude too insensitive to find organics from either the Atacama desert or the dry valleys of Antarctica, but also because sulfur poisoned the palladium foil that was intended t... | <urn:uuid:0e3e7414-8e50-40ba-afad-bee09b30a274> | 2.9375 | 593 | Personal Blog | Science & Tech. | 50.852108 |
Telescope spots solar tsunami
Dec. 7, 2006: The prototype of a new solar patrol telescope in New Mexico recorded a tsunami-like shock wave rolling across the visible face of the Sun following a major flare even on Wednesday, Dec. 6, 2006, at 18:28 Universal Time (11:28 MST). The shock wave, known as a Moreton wave, als... | <urn:uuid:8534f2be-6019-4d52-a6c4-2a832d11877c> | 3.484375 | 249 | Comment Section | Science & Tech. | 44.438238 |
IS THE SPEED OF LIGHT CONSTANT?
Late in life Einstein couldn’t even remember whether he’d been aware, in 1905, of the Michelson-Morley experiment, which showed that the speed of light is constant in all directions. Although we now think of the experiment as having shattered absolute space and time, that result was not ... | <urn:uuid:76977998-b1f4-4a2b-bad5-6f4344c79ca1> | 4.09375 | 1,566 | Nonfiction Writing | Science & Tech. | 42.738007 |
Signals represent conditions that arise during computation. Each corresponds to one context flag and one context trap enabler.
The context flag is incremented whenever the condition is encountered. After the computation, flags may be checked for informational purposes (for instance, to determine whether a computation w... | <urn:uuid:8b1f5709-be3a-4a12-be7b-463d20c30818> | 2.953125 | 560 | Documentation | Software Dev. | 33.318389 |
movie demonstrates the increase in solar
activity from 1996-99. The images we're
taken by the SOHO spacecraft.
to launch movie.)
In the mid-1800s astronomers discovered
from thousands of sunspot sightings that, when they tabulated
and graphed them, their numbers increased and decreased over
time in a repeatable cycle. ... | <urn:uuid:c593e01b-7fb4-4dfd-9c9c-6f72e9fffd9f> | 4.09375 | 549 | Knowledge Article | Science & Tech. | 49.899183 |
The role of water
Although water is not directly involved as the transporting medium in mass-wasting processes, it does play an important role. Think about building a sandcastle on the beach. If the sand is totally dry, it is impossible to build a pile of sand with a steep face like a castle wall. If the sand is somewh... | <urn:uuid:45aab117-4e0e-4e6c-ab8f-97e50cac2809> | 3.984375 | 269 | Knowledge Article | Science & Tech. | 48.166702 |
How Life could Evolve in a Red Dwarf Star System
On Earth it is believed that life originated or could have originated in caves or round Hydrothermal vents. If life evolved similarly in a Red dwarf star system life could adapt over millions of years to cope with stellar flares. Scientists disagree about whether life co... | <urn:uuid:f511560d-9839-409c-afb3-4635a5cde446> | 4.15625 | 1,673 | Knowledge Article | Science & Tech. | 44.206793 |
Gray Whiskers stacey.d via Flickr With their strange 60-atom structures, buckyballs could have potential as drug carriers, medical tracers, cancer fighters and other interesting applications in the human body, but studies examining their impact on the body have had mixed results. A group of French researchers set out t... | <urn:uuid:79fc998a-d567-4fc5-a8ef-ecacb3360ec8> | 3.09375 | 314 | Content Listing | Science & Tech. | 48.258973 |
June 1, 2004: Astronomers unveiled the deepest images from NASA's new Spitzer Space Telescope today, and announced the detection of distant objects — including several supermassive black holes — that are nearly invisible in even the deepest images from telescopes operating at other wavelengths.See the rest:
Supermassiv... | <urn:uuid:e437963e-08b4-4355-95c9-1670ac01aaff> | 4.3125 | 249 | Knowledge Article | Science & Tech. | 38.527871 |
Degree - The greatest exponent in a polynomial or equation.
- 3x13 + 5x3 (Degree: 13)
- h5 + h4 + h8 + h3 + h12 + h2 + 13h (Degree: 12)
- y = -5b + 19 (Degree : 1; Note, b is raised to the 1st power.)
- ƒ(x) = 5x9 - 5 (Degree: 9)
Why is This Important?
- The degree of a function determines the most number of solutions ... | <urn:uuid:4db07c60-c3f6-47d3-9d53-0950655d8997> | 3 | 205 | Structured Data | Science & Tech. | 83.323 |
Exploring Hydrocarbon Depletion
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Turns out it's not such a crazy argument after all.
Scientists link melting glaciers to earthquakes
Experts ponder whether tectonic activity increasing
Some scientists theorize that the su... | <urn:uuid:edbab3b2-ae3c-4cb3-9b4e-9ae681e2a39c> | 3.171875 | 758 | Comment Section | Science & Tech. | 46.099831 |
This is an old physics olympiad problem, I think. The answer hinges on the spheres expanding due to heating. Sphere A raises its center of mass some and sphere B lowers its center of mass some. By conservation of energy sphere A is thus slightly colder, since more of its energy went into its gravitational potential.
It... | <urn:uuid:6442d204-9d23-441a-b9b5-885f555ebb5a> | 3.25 | 211 | Q&A Forum | Science & Tech. | 52.744874 |
Planck's constant, symbolized h, relates the energy in one quantum (photon) of electromagnetic radiation to the frequency of that radiation. In the International System of units (SI), the constant is equal to approximately 6.626176 x 10-34 joule-seconds. In the centimeter-gram-second (cgs) or small-unit metric system, ... | <urn:uuid:bbcde94c-cae5-487e-8a76-a1005005b0cc> | 3.40625 | 166 | Knowledge Article | Science & Tech. | 63.458919 |
Our view of the Universe just grew quite a bit more detailed as NASA JPL released the compendium of results from the Wide-field Infrared Survey Explorer orbital telescope. WISE was launched into a 525 km orbit on December 14, 2009 and gathered data until the WISE team ran out of funding on February 17, 2011.
With hardw... | <urn:uuid:091099fe-0559-4a76-9f81-dc3d63849441> | 4 | 195 | Personal Blog | Science & Tech. | 51.135127 |
NASA image created by Jesse Allen, using data provided courtesy of NASA/GSFC/METI/ERSDAC/JAROS, and the U.S./Japan ASTER Science Team. Caption by Rebecca Lindsey.
Twelve miles west of Redding, California, a fire touched off by lightning in late June 2008 continued to creep through timber and brush in the Whiskeytown Na... | <urn:uuid:b4b7d57f-58a8-4789-9049-8e29eea35f38> | 3.0625 | 203 | Knowledge Article | Science & Tech. | 42.048135 |
sharp view from the
Thermal Emission Imaging System
NASA's Mars Odyssey orbiter is centered on 154 kilometer (96 mile)
wide Gale crater, near the martian equator.
an impressive layered mountain rises about 5 kilometers
(3 miles) above the crater floor.
Layers and structures near its base are thought
to have been formed... | <urn:uuid:bcb37c48-ea00-4bc5-8707-7b22dd6974dc> | 3.5625 | 213 | Knowledge Article | Science & Tech. | 35.621959 |
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
A rigorous basis for the new discipline of analysis was achieved in the 19th century, in particular by the German mathematician Karl Weierstrass. ... | <urn:uuid:02e90b13-e298-4230-b474-6c246fa7ada2> | 3.640625 | 309 | Truncated | Science & Tech. | 39.040163 |
Chandra Looks Back At Earth
A team of scientists observed Earth’s north polar region ten times during a four-month period in 2004. As the bright arcs in this sample of images show, they discovered low-energy (0.1 - 10 kilo electron volts) X-rays generated during auroral activity. Other satellite observatories had previ... | <urn:uuid:7d70c302-2d4b-44bf-a303-8b983000eaa5> | 3.890625 | 257 | Truncated | Science & Tech. | 46.202914 |
Mega mushroom expands in Oregon forest
This article was posted on December 7, 2000.
One Thousand Football Fields
Officially known as Armillaria ostoyae, or the honey mushroom, the fungus is 3.5 miles across and takes up 1,665 football fields. The small mushrooms visible above ground are only the tip of the iceberg.
Exp... | <urn:uuid:1446307f-5386-4113-9781-32887ed40ee0> | 3.546875 | 282 | Knowledge Article | Science & Tech. | 49.39757 |
The fossilized footprints of dinosaurs tell the story of fumbles,
jaunts, jogs and sprints. But for other groups who swam during the Mesozoic,
the clue to their speed, and also their metabolism, is in their tails.
An evolutionary plus for large fish, cetaceans and some marine reptiles was a tail fin shaped like that of... | <urn:uuid:70cc1770-ee35-4166-8179-529e5107d583> | 3.90625 | 1,326 | Knowledge Article | Science & Tech. | 40.82664 |
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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Topic review (newest first)
Oh! So inequality inside parenthesis in the probability arithmetic means sum of probabilities of all events which satisfy the inequality?
I thin... | <urn:uuid:7cee21a7-f9b5-4b31-9a7e-9c12f7bee7c1> | 3.6875 | 495 | Comment Section | Science & Tech. | 83.963399 |
Billiards as dynamical systems
Dynamical systems are defined as the set of prescribed rules to evolve certain state in time. If the rules involve some random or probability feature (e.g., lottery) we say that the dynamical system is stochastic. Otherwise the system is called deterministic. Billiards are very illustrati... | <urn:uuid:98c444a2-423f-4d2f-9358-80141b90e677> | 2.9375 | 1,033 | Knowledge Article | Science & Tech. | 53.069013 |
Joined: 16 Mar 2004
|Posted: Wed Sep 20, 2006 11:30 am Post subject: How Electrons Move Through a Nano-Transistor
|Scientists Attain Control of How Electrons Move Through a Nano-Transistor
Today, all electronics are based on transistors. Danish scientists are leading the field in creating the smallest transistors (call... | <urn:uuid:b6e80455-4a2e-49d4-88bb-88a5f662c849> | 3.453125 | 270 | Comment Section | Science & Tech. | 33.099398 |
We may think of volcanic eruptions as deadly events, but volcanoes have played a major role in shaping the Earth and the life that lives on it. Volcanoes are not all the same. Try creating the different types and find out about the elements that shape them.
Decide whether your lava is runny or sticky and how much water... | <urn:uuid:084403f2-0921-4b78-97b2-82212b71f161> | 3.53125 | 141 | Content Listing | Science & Tech. | 64.653474 |
|Nov21-12, 01:35 AM||#1|
electric lines of force
can any one tell me how to calculate the electric lines of force of an arbitrary electric charge configuration ?
i have heard that in static case there is no electric field inside a conductor . i now wanna know that is there any dynamical case for the conductor instead o... | <urn:uuid:77150834-6b57-42aa-a081-76c7a6bbd794> | 3.171875 | 1,011 | Comment Section | Science & Tech. | 42.415033 |
Probaway-Wind is group of methods for converting huge quantities of wind power into available power very cheaply.
The actual device for converting wind to power, which is discussed below, is a group of simple mechanical components with some computer monitoring and control. The solution to the problem of how to get the ... | <urn:uuid:a831fba5-958b-4b28-821b-aa388c3044d3> | 2.984375 | 1,006 | Knowledge Article | Science & Tech. | 72.122732 |
Southern AERA Quarterly Activity Bulletin of the South Carolina Department of Natural Resources- Southeast Regional Climate Center
Volume 3, No. 1
The 7th Annual Sky Awareness Week (SAW) celebration will be held April 20-26, 1997. Once again, the theme will be centered on
Since 1991, 42 states and the District of Colum... | <urn:uuid:fa8a9031-4c2a-4900-be4a-4687e8cf9e41> | 3.25 | 1,923 | Knowledge Article | Science & Tech. | 43.924533 |
|Enlarge ImageA slice through the center of a long-dead brain coral is a slice through human and ocean history. This 1,000-pound coral grew near Bermuda for 200 years. Scientists will analyze the coral's skeleton to decipher ocean temperatures during its lifespan. (Tom Kleindinst, Woods Hole Oceanographic Institution)
... | <urn:uuid:f9521219-0c89-402a-b9da-8ed64c27ba41> | 3.28125 | 1,897 | Knowledge Article | Science & Tech. | 35.213038 |
Mixing and Segregation in Chemical Reactors (CSTR versus PFR)
For very fast chemical reactions or viscous liquids, one must take into account the segregation of reactants. The intensity of segregation varies between 0 (perfect mixing) and 1 (no mixing). Mixing intensity can influence reaction rates and selectivities.
T... | <urn:uuid:d7561e98-ce72-48f0-9f59-8698c8b22bd7> | 3.1875 | 306 | Knowledge Article | Science & Tech. | 24.923475 |