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For any number "a" (except zero), a0 = 1.
Now I have a homework problem:
Simplify the expression: mn0
So, I put in for my answer 1, but when it was graded the teacher said that that was the wrong answer. How could it be wrong if any number the the power if zero is 1? Did I misread my book, or did the teacher's answer k... | <urn:uuid:77489e05-b932-42b0-b0ad-40b8c04d38f3> | 2.734375 | 93 | Q&A Forum | Science & Tech. | 79.0925 |
A derecho is a widespread and long-lived, violent convectively induced windstorm that is associated with a fast-moving band of severe thunderstorms usually taking the form of a bow echo.
Derechos are usually not associated with a cold front, but a stationary front.
For more information about the topic Derecho, read the... | <urn:uuid:18cacafc-fc8c-448f-b38e-204e6e70fc81> | 2.90625 | 109 | Knowledge Article | Science & Tech. | 25.345 |
Web edition: March 10, 2004
Print edition: March 13, 2004; Vol.165 #11 (p. 175)
"Tapping sun's light and heat to make hydrogen" (SN: 1/17/04, p. 46: http://www.sciencenews.org/articles/20040117/note14.asp) seems to be delivering good news for the environment: "Clean" hydrogen can be produced from water using solar ener... | <urn:uuid:2496cf15-15d9-4ad4-bd4a-9defd27572b1> | 3.109375 | 564 | Nonfiction Writing | Science & Tech. | 67.835926 |
Pluto is a small, mysterious world, deep in the cold, dark recesses of the distant outer solar system. It was named a planet when it was discovered in 1930, but that designation has been in dispute for some years now. The issue was settled in August of 2006, when the International Astronomical Union reclassified Pluto ... | <urn:uuid:128c7352-c6fb-45b2-85f9-137af4b75527> | 4.15625 | 655 | Knowledge Article | Science & Tech. | 63.403278 |
Explains the natural and human-affected factors that determine the concentration of contaminants in groundwater, especially where the concentration is different at the surface than at depth, and where pumping varies with time.
We estimated in-place resources of 1.07 trillion short tons of coal in this area using a geol... | <urn:uuid:a7e00bee-0b1d-4ab5-a85b-352d4a9f75a1> | 3.4375 | 203 | Knowledge Article | Science & Tech. | 25.369778 |
|From: Martegan||17/06/00 2:07:14|
|Subject: How does mass warp space?||post id: 85991|
I've seen the diagrams of a bowling ball creating a depression on a rubber sheet as a description of mass warping space. Problem is, it would seem that the very thing causing this depression is gravity itself (turn the diagram up-si... | <urn:uuid:de87dba5-192f-4948-8c5b-ebfa64f6710e> | 3.140625 | 2,752 | Comment Section | Science & Tech. | 66.170704 |
Sun’s energy could be used to zap dangerous asteroids
Described as a ‘directed energy orbital defense system’, DE-STAR is designed to harness some of the power of the sun and convert it into a massive phased array of laser beams that can destroy, or evaporate, asteroids posing a potential threat to Earth.
It can also b... | <urn:uuid:aaafaf54-1f52-4978-911c-1841a1d90ef6> | 2.859375 | 504 | Personal Blog | Science & Tech. | 38.991495 |
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Warning: Missing argument 2 for wpdb::prepare(), called in /home/nithish/public... | <urn:uuid:a24aba72-5976-452c-9c7e-035239fc4f22> | 2.90625 | 719 | Tutorial | Software Dev. | 72.6619 |
Black holes vibrate at a frequency whose pitch corresponds to the note of B flat. However, don’t be surprised if you can’t find any recordings of it; the note that black holes create is 57 octaves below any B flat that can be detected by human ears.
The above fact blows my mind for a number of reasons. First of all, it... | <urn:uuid:cf4447cd-80eb-43e4-9730-0dd01e99fe2b> | 3.53125 | 819 | Personal Blog | Science & Tech. | 39.928137 |
That genetic differences account for a substantial part of biological variability is hardly in dispute, and the inclusion of genetics (and increasingly molecular genetics) was arguably the key contribution that created neo-Darwinism and led to the ‘modern synthesis’ of evolutionary theory.
Selective breeding programmes... | <urn:uuid:8c2ec20a-afcb-4611-afc1-d2c1cc4882d4> | 3.203125 | 340 | Truncated | Science & Tech. | 37.081364 |
The test package is meant for internal use by Python only. It is documented for the benefit of the core developers of Python. Any use of this package outside of Python’s standard library is discouraged as code mentioned here can change or be removed without notice between releases of Python.
The test package contains a... | <urn:uuid:41bc7ad7-ebb4-4e82-9553-9923503fcdfb> | 2.71875 | 1,888 | Documentation | Software Dev. | 52.42598 |
Earthquake Glossary - seismic moment
The seismic moment is a measure of the size of an earthquake based on the area of fault rupture, the average amount of slip, and the force that was required to overcome the friction sticking the rocks together that were offset by faulting. Seismic moment can also be calculated from ... | <urn:uuid:4c507c7c-32c5-4dc1-9540-151f2bdc460f> | 3.734375 | 113 | Structured Data | Science & Tech. | 26.090813 |
ANSI Common Lisp 3 Evaluation and Compilation 3.3 Declarations
3.3.4 Declaration ScopeDeclarations can be divided into two kinds: those that apply to the bindings of variables or functions; and those that do not apply to bindings.
A declaration that appears at the head of a binding form and applies to a variable or fun... | <urn:uuid:7b95b861-fc53-4ee4-b448-b9a486584035> | 2.796875 | 313 | Documentation | Software Dev. | 41.385047 |
Introduction to Ice Science
Thousands of scientific papers have been written on ice science and many scientists have devoted their lives to the field. Many books have been written and several of them are sill in print. Most of this work is related to polar ice, glacial ice, ice physics, etc., however there are a reason... | <urn:uuid:19f643f5-4fd0-4426-ba35-167d09247feb> | 2.75 | 223 | Knowledge Article | Science & Tech. | 46.630491 |
Named after the astronomy Edwin Hubble, this long overdue space-based telescope was put into orbit…and it didn’t work courtesy of a lens ground to the wrong specification (the media probably got this wrong, effective telescopes after Newton use mirrors because chromatic aberration rendered lenses impractical). How it s... | <urn:uuid:675d9c9d-f307-48f3-b369-a426e4a61b1f> | 2.765625 | 353 | Personal Blog | Science & Tech. | 50.583511 |
3 The irreversible Universe
3.3 Statistical mechanics
Part 1 of 2 | Part 2For a printable version of '3 The irreversible Universe' click here
There is a special branch of physics, called statistical mechanics, which attempts to bridge the gap between descriptions on the scale of molecules and thermodynamics. It recogni... | <urn:uuid:2003f1df-5a46-4718-881f-5d202c9c1a79> | 3.171875 | 336 | Truncated | Science & Tech. | 30.717596 |
Focus Areas for Swift
Our galaxy, the Milky Way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and about six times as much dark matter as all the stars and gas put together. And it’s all held together by gravity. Like more than two-thirds of the known galaxies, the M... | <urn:uuid:2b5e879f-b2af-41d5-a9d0-561281a9ee81> | 3.703125 | 139 | Knowledge Article | Science & Tech. | 53.520791 |
|Name Meaning:||Thick Headed Lizard|
|Distribution:||North America (Montana, South Dakota, Wyoming)|
|Time Period:||Late Cretaceous, 75 Ma - 65 Ma|
|Length:||15 ft (4.5 m)|
|Height:||17.5 ft (4.3 m)|
|Diet:||Herbivore or Omnivore|
Not much is known about the Pachycephalosaurus because only a single nearly-complete skul... | <urn:uuid:5e07622b-6d67-4afe-a62b-bf6205ce696b> | 3.65625 | 551 | Knowledge Article | Science & Tech. | 57.246658 |
User-mode Linux can be ported to other operating systems that have the necessary functionality. The ability to virtualize Linux system calls by intercepting and nullifying them in the host kernel is essential. An OS that can't do that can't run this port. Also needed is the ability to map pages into an address space in... | <urn:uuid:a9d45f49-269d-4016-a5e1-bc19734f15b8> | 2.90625 | 297 | Documentation | Software Dev. | 40.244187 |
If all users of your instance of SQL Server speak the same language, you should pick the collation that supports that language. For example, if all users speak French, select a French collation. If the users of your instance of SQL Server speak different languages, you should pick a collation that best supports the req... | <urn:uuid:d7ae83e0-dcf8-4aad-8729-6b4580e9fa72> | 2.71875 | 370 | Documentation | Software Dev. | 33.962105 |
|Image Credit: Markos Possel Mapos|
A few weeks ago word spread of the passing of F. Sherwood Rowland. The first notice was a press release on the UC Irvine website. He had an illustrious career as a chemist and won a Nobel Prize in Chemistry. I never had the pleasure of meeting him, but there are few in meteorology th... | <urn:uuid:0233281b-b2e1-4ae2-b9c1-61b732be06e3> | 3.171875 | 1,407 | Personal Blog | Science & Tech. | 52.497679 |
DNA Replication Rates lower Eukaryotes and Prokaryotes... why a difference...
dellaire at ATLAS.ODYSSEE.NET
Tue Jan 16 01:05:18 EST 1996
>for a biology paper,=20
>i need to solve the follwing question:
>WHY IS DNA REPLICATION IN PROKARYOTES NEARLY 100 TIMES FASTER THAN
>REPLICATION IN EUKARYOTES ?
The numbers I have qu... | <urn:uuid:cd94839f-1f26-4db0-abb2-0fb66ad2b43e> | 3.296875 | 790 | Comment Section | Science & Tech. | 65.029198 |
popen is used to read and write to a unix pipe.
This function is NOT included in 'C Programming Language' (ANSI) but can be found in 'The Standard C Library' book.
Library: stdio.h Prototype: FILE *popen(const char *command, const char *type); Syntax: FILE *fp; fp = popen( "ls -l", "r"); Notes: command - is the command... | <urn:uuid:9fde86f7-085e-44ef-b94b-622e98a440e9> | 3.53125 | 143 | Documentation | Software Dev. | 87.729187 |
Atmospheric Gases Block UV <290 nm
The column of absorbing gas in the path of incoming radiation includes atomic and molecular nitrogen and oxygen and their products. These gases block all short wave ultraviolet radiation. Molecular oxygen in the stratosphere (10 to 48 km) absorbs short wave (up to 242.4 nm from the gr... | <urn:uuid:f0bf582e-10df-4c11-84aa-e65da6b13445> | 3.609375 | 617 | Academic Writing | Science & Tech. | 57.638354 |
rates of freezing
I should know the answer to this question.
So should the physics and chemistry teachers
at our school, but they disagree.
I have heard two, perfectly good explanations
with different "facts". Here goes.....
DOES hot water freeze faster than cold
water? (You were expecting something really
good were no... | <urn:uuid:ed7f1135-1d91-48bd-a94f-d5ea60d23aa9> | 2.703125 | 669 | Q&A Forum | Science & Tech. | 59.238978 |
Last year more than 1 million Americans had their eyes zapped with lasers to free themselves from eyeglasses. For the majority, the procedure was a success-but not for everyone. People who are farsighted, for instance, don't generally have great results. Many experience side effects such as seeing halos around objects.... | <urn:uuid:bf1c69dd-2f4e-42b7-831b-ce5eec4556c3> | 2.6875 | 334 | Listicle | Science & Tech. | 46.545957 |
What is the average kinetic energy of a substance
It's its temperature! Thanks for using ChaCha!
More Answers to "What is the average kinetic energy of a substance"
- What is the measure of the average kinetic energy of the particle...?
- Temperature, which is the average kinetic energy of all the particles that make u... | <urn:uuid:eeb8750d-3cb3-43e3-9799-df0b316e00a7> | 2.6875 | 644 | Q&A Forum | Science & Tech. | 46.46335 |
A photo of the SWICS instrument
Click on image for full size
Courtesy of the University of Maryland Space Physics Group
SWICS Instrument Page
The SWICS (Solar Wind Ion Composition Spectrometer) instrument on Ulysses is to measure the frequency of occurence, temperature and average speed of all the major solar wind ions... | <urn:uuid:5170cefc-10e4-4b38-a1c1-f61d8f0458b9> | 3.421875 | 593 | Knowledge Article | Science & Tech. | 58.032028 |
Recently, the students have been complaining that physics has been putting too pressure on them. But what is pressure?
In physics we can define pressure on a solid as a force distributed over the contact surfaces of the two objects.
P = F/A
where P is pressure, F is force, and A is the area between the two surfaces in ... | <urn:uuid:a6e10ef7-d246-4116-aaa3-0e468dea78ac> | 3.65625 | 440 | Personal Blog | Science & Tech. | 56.512811 |
The Contribution of Global Transport on
- Ehlers,Susanna(2007).pdf (3.751Mb PDF)
- May 18, 2007
- Carbon Monoxide
- Carbon monoxide, CO, is produced by natural and anthropogenic processes including biomass burning and fossil fuel usage and affects atmospheric chemistry through its roles as a sink for the hydroxyl radic... | <urn:uuid:a180d2df-f93b-4474-9e7a-0e7996e8f2c8> | 3 | 399 | Academic Writing | Science & Tech. | 22.056678 |
Plate-wide deformation before the Sumatra-Andaman earthquake
Crampin, Stuart; Gao, Yuan. 2012 Plate-wide deformation before the Sumatra-Andaman earthquake. Journal of Asian Earth Sciences, 46. 61-69. 10.1016/j.jseaes.2011.10.015Full text not available from this repository. (Request a copy)
Rock is weak to shear-stress ... | <urn:uuid:9c498e9c-e71f-4323-ac8c-352b5ff207b9> | 2.703125 | 422 | Academic Writing | Science & Tech. | 37.818487 |
How did this collaboration with National Physical Laboratory come about for your project The Fundamental Units?
For six months I was having tests run all around the UK on different types of microscopes such as scanning electron microscopes, at different institutions, universities and testing laboratories. The Curator o... | <urn:uuid:c4f224ed-a708-4930-91f4-7406500aa02b> | 2.9375 | 350 | Audio Transcript | Science & Tech. | 35.608419 |
The eye uses three methods to determine distance:
- The size a known object has on your retina - If you have knowledge of the size of an object from previous experience, then your brain can gauge the distance based on the size of the object on the retina.
- Moving parallax - When you move your head from side to side, o... | <urn:uuid:c2c81882-01a3-4ec4-8332-ffa79472b805> | 4.25 | 175 | Knowledge Article | Science & Tech. | 48.235364 |
A sigle wave
Superposition of waves
© The scientific sentence. 2010
1. Moving source forward an observer at rest
The source S is moving at right at the speed Vs in the frame of
the observer at rest. At the precise time T, which is the period of the wave;
this wave that was emitted from So reaches the observer. The sour... | <urn:uuid:dcc8036e-903c-4f75-94a3-ff8b7f11eeee> | 4.03125 | 1,179 | Documentation | Science & Tech. | 114.148886 |
Coming to you from the Air Force Space and Missile Museum at Cape Canaveral Air Force Station Florida — it’s a model of a Corona satellite:
Corona (originally known to the world via its cover name “Discoverer”) was the world’s first photo reconnaissance satellite program. It started in 1958 as one of a number of think-... | <urn:uuid:a8056b27-f77e-4fac-9782-06c77a8eca21> | 3.375 | 430 | Personal Blog | Science & Tech. | 39.042365 |
Are You Really Sleeping on Clean Bedsheets?
...use of indoor allergies. The other primary offenders cited in the arena of indoor allergens are pet dander and dust mold. Dust mites are microscopic arachnids
that feed on dead skin. They infest beds and carpets by the tens of millions. There can be as many as 1000 mites i... | <urn:uuid:4236a70d-f544-4fe8-82e4-cd4a2e09b076> | 2.9375 | 753 | Content Listing | Science & Tech. | 45.973901 |
Researchers at Worcester Polytechnic Institute have just done a batch of research that they hope will help turn the world's roads into cheap collectors of solar power.
They started with the assumption that asphalt gets frakking hot when the sun shines on it, and then started making some serious leaps.
First, they decid... | <urn:uuid:d3ef3199-e736-4c30-a881-0d8690f85d41> | 3.59375 | 461 | Personal Blog | Science & Tech. | 49.947308 |
Found 0 - 10 results of 89 programs matching keyword "model of the atmoshpere on mars"
In February 2013, Curiosity drilled into a rock called "John Klein" and then analyzed the sample material with its on-board scientific instruments. On March 12, NASA announced that the analyses show conditions on Mars were once favor... | <urn:uuid:e66f36ff-48eb-4175-bbbb-3bf68ef90f62> | 2.75 | 613 | Content Listing | Science & Tech. | 39.284315 |
Note: This message is displayed if (1) your browser is not standards-compliant or (2) you have you disabled CSS. Read our Policies for more information.
International Great Lakes Datum (IGLD) is the reference system by which Great Lakes-St. Lawrence River Basin water levels are measured. It consists of benchmarks at va... | <urn:uuid:59773736-0732-452d-8a4d-aed63e93c4a2> | 3.4375 | 254 | Knowledge Article | Science & Tech. | 58.854275 |
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
New Mexico Tem... | <urn:uuid:64d3d058-ba7e-4054-9e58-c96d65c02b67> | 2.734375 | 133 | Structured Data | Science & Tech. | 49.958588 |
What are tides, and why
do they happen?
How many high and low tides happen
Are all tides the same height?
page links to an interdisciplinary learning
created by geologists, chemists, physicists, and mathematicians.
The module will help students and teachers learn more about tides by using
different tools and methods of... | <urn:uuid:e2ca74ad-1dfe-4d47-8efb-545ad25a3cc1> | 3.359375 | 499 | Tutorial | Science & Tech. | 53.592277 |
The second lightest naturally occurring atomic element, and the most common in the universe after hydrogen. About one quarter of all conventional matter in the universe is helium, and it is plentiful in stars, the atmosphere of gas giants, and the interstellar gaseous medium, though rare on smaller rocky or icy planets... | <urn:uuid:ac73f3d5-4aff-4aa4-b9b6-c36adb8bb1c4> | 3.78125 | 213 | Knowledge Article | Science & Tech. | 27.450814 |
Global Climate Change and Energy
The Climate Challenge: Our Choices
The amount of carbon dioxide (CO2) in the atmosphere is increasing. The world is getting warmer. If this continues, the ecosystems and economies of the world will be dramatically altered. What can be done about this?
The Climate Challenge
Click on imag... | <urn:uuid:f1cfd9cc-b3bb-4d87-9523-e66d2c6327d3> | 3.875 | 2,403 | Knowledge Article | Science & Tech. | 52.23113 |
Radio Jet in 3C120
November 4, 2003
This pseudo color image shows the structure of the 1.66 GHz emission from the radio source 3C120 as measured by the VLBA in June 1994. The resolution is 0.015 by 0.007 arcseconds with the higher resolution in the east-west direction. The radio jet is seen extending from the bright co... | <urn:uuid:9103d09a-758d-4812-af72-aa5e67315740> | 2.859375 | 243 | Truncated | Science & Tech. | 53.587727 |
In this section, you will learn to convert an integer into a double. The the java.lang package provides the functionality for converting an integer type data into a double.
This program helps you in converting an integer type data into a double. Define a class named "IntegerToDouble" for java component. Program takes a... | <urn:uuid:15e4392d-5f00-4caf-8f81-24ebf176e9c5> | 3.5 | 178 | Tutorial | Software Dev. | 47.666827 |
The DOCTYPE describes to the Web browser displaying the page which set of rules to use when parsing (reading and displaying) the page.
So using one set of rules will display one way. Using a different set of rules means the page will display some other way.
More info here: http://www.w3schools.com/tags/tag_doctype.asp
... | <urn:uuid:970625e1-2dea-4f45-9b95-6f55c92d42f2> | 3.140625 | 642 | Comment Section | Software Dev. | 71.021196 |
Water sampling devices range from a bucket dropped over the side of a small boat to large water bottles sent toward the deep ocean seafloor on a wire. Probably the most commonly used water sampler is known as a rosette. It is a framework with 12 to 36 sampling bottles (typically ranging from 1.2- to 30-liter capacity) ... | <urn:uuid:72df81ea-5d0b-49b3-819e-a1cf86dfc38c> | 3.03125 | 164 | Knowledge Article | Science & Tech. | 28.08 |
This species has a very wide range from Central America (recorded as far north as Costa Rica) south throughout tropical South America. Costa Rica: Atlantic slope from sea level to 800m.
This species inhabits wet forest habitats. It is most often encountered by looking under stones or by sifting leaf litter from the for... | <urn:uuid:b93f954d-9cc0-4b3c-8d49-a659ca328172> | 2.953125 | 281 | Knowledge Article | Science & Tech. | 53.134878 |
Mount Everest is often the site of impressive physical feats, as climbers brave brutal conditions to scale the tallest peak in the world. But the extreme altitude takes quite a toll on the body, causing hypoxia, muscle loss, sleep apnea, and other ill effects. Many of the same symptoms are more commonly found in elderl... | <urn:uuid:11888fc0-4204-44b3-b0c5-7403211699dc> | 3.796875 | 411 | Truncated | Science & Tech. | 41.269568 |
Batman’s ability to fly is a falsehood. Or at least so says science. We didn’t know science was into disproving super-hero movies (that’s a deep well to drink from) but to each his own. But back in December the Journal of Physics Special Topics took on the subject with their scholarly paper entitled Trajectory of a Fal... | <urn:uuid:081f5372-8d7b-470b-a955-d71b7bed6ba4> | 3.375 | 212 | Personal Blog | Science & Tech. | 80.61014 |
Provided by: manpages-pt-dev_20040726-2_all
strcpy, strncpy - copy a string
char *strcpy(char *dest, const char *src);
char *strncpy(char *dest, const char *src, size_t n);
The strcpy() function copies the string pointed to be src (including
the terminating ‘\0’ character) to the array pointed to by dest. The
strings m... | <urn:uuid:8abcfb20-6e14-44d7-b0ae-d43c55661726> | 3.6875 | 326 | Knowledge Article | Software Dev. | 70.779535 |
Introduction of Special RelativityIn 1905, Albert Einstein published (among other things) a paper called "On the Electrodynamics of Moving Bodies" in the journal Annalen der Physik. The paper presented the theory of special relativity, based upon two postulates:
Actually, the paper presents a more formal, mathematical ... | <urn:uuid:1dccb60c-7790-4d4e-869a-5b07ecb71d52> | 4.28125 | 906 | Knowledge Article | Science & Tech. | 24.591363 |
Major Section: MISCELLANEOUS
:max ; the command most recently typed by the user :x ; synonymous with :max (:x -1) ; the command before the most recent one (:x -2) ; the command before that :x-2 ; synonymous with (:x -2) 5 ; the fifth command typed by the user 1 ; the first command typed by the user 0 ; the last command... | <urn:uuid:9bbcb315-8fd6-4945-b821-c3cd8c524869> | 2.890625 | 811 | Documentation | Software Dev. | 54.725319 |
In high energy physics, the most frequently encountered standard distributions governing frequencies (e.g. for events) are the Poisson distribution, the Gaussian distribution, and the binomial distribution. The statistical literature is replete with excellent discussions of these and other distributions, and a full exp... | <urn:uuid:f4ec8da6-0fa8-4e3b-b16d-c52fe7f6bb69> | 2.984375 | 881 | Knowledge Article | Science & Tech. | 33.129712 |
Science Fair Project Encyclopedia
The phase of a wave relates the position of a feature, typically a peak or a trough of the waveform, to that same feature in another part of the waveform (or, which amounts to the same, on a second waveform). The phase may be measured as a time, distance, a fraction of the wavelength, ... | <urn:uuid:89195cfa-0b2c-4d86-91e4-7984937f6020> | 4.25 | 761 | Knowledge Article | Science & Tech. | 52.88158 |
Science Fair Project Encyclopedia
Smoke signals is an early form of the optical telegraph, developed by the native North Americans and Chinese (as in the towers of the Great Wall.) By covering an open fire with a blanket, and suddenly removing it for a short time, a puff of smoke is generated. With some training, the s... | <urn:uuid:e6c9a327-a816-4aa0-bc98-32ddd0c84515> | 3.796875 | 208 | Knowledge Article | Science & Tech. | 39.744076 |
American solar satellite. One launch, 1997.08.25.
The primary purpose of ACE was to determine and compare the isotopic and elemental composition of several distinct samples of matter, including the solar corona, the interplanetary medium, the local interstellar medium, and Galactic matter.
ACE was conceived at a meetin... | <urn:uuid:2b58e6ee-de7c-435c-a3ea-406bf91f3d8b> | 2.875 | 1,685 | Knowledge Article | Science & Tech. | 50.089855 |
How To Use A Hydrometer
A hydrometer is an instrument whose function is based on Archimedes principle. This principle states that a body (the hydrometer) immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid. The hydrometer measures the weight of the liquid displaced by the volume of th... | <urn:uuid:0052626e-3a27-402a-90da-c5853e9ca88a> | 3.9375 | 803 | Tutorial | Science & Tech. | 72.978654 |
by Zen Gardner
Here’s another scientific “anomaly” for which we can’t expect a straight answer. While it is apparently “puzzling scientists” we’re no doubt given hardly any information on what’s going on in the overt and covert space programs.So what do you expect us to think when we read science reports like this:
“My... | <urn:uuid:4b3b5750-44f9-4efe-ba27-a515f640d1ed> | 3.46875 | 929 | Personal Blog | Science & Tech. | 42.052717 |
Satellite View Selection
09:30 UTC on Friday 24 May 2013 | Cloud/surface composite, Australia
Images from Japan Meteorological Agency satellite MTSAT via Bureau of Meteorology.
Australian Government Bureau of Meteorology
National Meteorological and Oceanographic Centre
Satellite Notes for the 0000UTC chart on 25 May 20... | <urn:uuid:ca94869d-0003-4e48-8bac-ffecbe205654> | 2.75 | 260 | Knowledge Article | Science & Tech. | 40.144987 |
Characteristics of SQL
Characteristics of SQL:
* SQL is an ANSI and ISO standard computer language
for creating and manipulating databases.
* SQL allows the user to create, update, delete, and
retrieve data from a database.
*SQL is very simple and easy to learn.
*SQL works with database programs like DB2, Oracle,
MS Ac... | <urn:uuid:de174013-e928-4127-bfbf-69e268ca4690> | 3.53125 | 87 | Knowledge Article | Software Dev. | 48.402829 |
Storm season ends: Are potent hurricanes linked to global warming?
(Page 2 of 2)
Gray, for example, argues that Atlantic hurricane records show that storms are stronger and more frequent for several decades, then ease for several decades.Skip to next paragraph
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These changes correspond wit... | <urn:uuid:6ad93273-f619-4a39-984b-4734f8cae092> | 2.953125 | 653 | Truncated | Science & Tech. | 45.90602 |
"Scientists have been trying to find the sources of high-energy cosmic rays since their discovery a century ago," said Elizabeth Hays, a member of the research team and Fermi deputy project scientist at NASA's Goddard Space Flight Center in Greenbelt, Md. "Now we have conclusive proof supernova remnants, long the prime... | <urn:uuid:e03c1291-f37e-440e-b1c9-4236b1feece2> | 3.96875 | 1,647 | Content Listing | Science & Tech. | 47.418738 |
Experimental NASA research models, based on observations from the Solar Terrestrial Relations Observatory (STEREO) and the ESA/NASA mission the Solar and Heliospheric Observatory, show that the CME left the sun at speeds of 275 miles per second. This is a fairly typical speed for CMEs, though much slower than the faste... | <urn:uuid:32466d88-d9d8-4f7a-b5a8-3fb288250a4e> | 3.796875 | 1,135 | Knowledge Article | Science & Tech. | 50.353509 |
Topic review (newest first)
- 2005-12-21 21:25:37
Or it would be a straight line.
- 2005-12-21 21:24:35
True. I forgot about that bit. Yes, two sides of a triangle must always be greater than the other side, because otherwise they wouldn't be able to reach its two ends.
- John E. Franklin
- 2005-12-21 15:03:21
in maths... | <urn:uuid:53e16762-df87-4500-bda6-c2e1ca0a4686> | 2.875 | 941 | Comment Section | Science & Tech. | 100.075414 |
by Staff Writers
Nashville TN (SPX) Nov 07, 2011
As a first line of defense, steel barrels buried deep underground are designed to keep dangerous plutonium waste from seeping into the soil and surrounding bedrock, and, eventually, contaminating the groundwater. But after several thousand years, those barrels will natur... | <urn:uuid:41ce3dc3-6a24-4967-bb61-20b2cb115b55> | 3.984375 | 913 | Truncated | Science & Tech. | 36.364328 |
A Mars meteorite
is a meteorite
that has landed on Earth and originated from Mars
. This could have been the result of an impact of a celestial body on Mars, sending material from Mars into space. Of the many thousand meteorites that have been found on Earth, only 34 have been identified as originating from Mars, most ... | <urn:uuid:ae75d6ad-434f-41a3-bc41-fa8a2f7d1de5> | 3.984375 | 1,675 | Knowledge Article | Science & Tech. | 44.348293 |
A major theme of IonE's work is the management of freshwater resources. When the population growth of the next 40 years is coupled with the climate change likely to occur in that time, the availability of clean, fresh water will be a major issue. The water sources for intensely populated parts of the world, often fed b... | <urn:uuid:062a65c0-c0cd-444d-ba53-8ec9c2164941> | 3.265625 | 335 | Knowledge Article | Science & Tech. | 32.006235 |
Some of the costs and benefits of reactive nitrogen in the environment can be seen clearly in nitrogen-deficient habitats like the Bornean dwarf forests known as “kerangas.” Kerangas grow in soils that are acidic, sandy and podzolized. Essential elements enter the soil from decaying leaf litter, but most of these--magn... | <urn:uuid:98491007-061b-4586-8e7f-22e1be2d1e36> | 4.0625 | 426 | Academic Writing | Science & Tech. | 30.040208 |
Introduction to Multituberculates
The Lost Tribe of Mammals
Multituberculates are the only major branch of mammals to have become completely extinct, and have no living descendants. Although not known to many people, they have a 100 million-year fossil history, the longest of any mammalian lineage. These rodent-like ma... | <urn:uuid:33984f49-97b5-45bd-8bb9-69ba0846c46a> | 3.828125 | 341 | Knowledge Article | Science & Tech. | 24.785165 |
Image: Devil's Coach-horse Beetle
Devil's Coach-horse Beetle Creophilus erythrocephalus.
- Richard Major
- © Australian Museum
Rove beetles - Family Staphylinidae
Staphylinids are usually elongate beetles with small elytra (wing covers) and large jaws. Like other beetles inhabiting carrion, they have fast larval develo... | <urn:uuid:d346d06b-5d17-4d4d-b034-d5788be4187f> | 3.296875 | 270 | Knowledge Article | Science & Tech. | 33.720106 |
dnsfilter reads a series of lines from stdin, converts an IP address to a host name at the beginning of each line, and prints the results to stdout.
If a line does not begin with an IP address, dnsfilter leaves the line alone. If an IP address does not have a host name listed in DNS, dnsfilter leaves the line alone. If... | <urn:uuid:52547f5d-a25f-4d8f-bf6c-3e4366603548> | 2.734375 | 184 | Documentation | Software Dev. | 58.899685 |
qc is a testing tool that lets you write properties that you expect to hold true, and let the computer generate randomized test cases to check that these properties actually hold. For example, if you have written compress and decompress functions for some data compression program, an obvious property to test is that co... | <urn:uuid:f5315a35-1cdd-4da0-8ed5-5b9a5ebcfb1c> | 3.25 | 1,250 | Documentation | Software Dev. | 63.435599 |
Date: Dec 15, 2011 11:53 AM
Author: Milo Gardner
Subject: Egyptian fraction math only used quotient and remainder statements
Franz, and list members:
Franz offers a distraction quoted by:
"I don't know what problem number 31 of the Rhind Mathematical Papyrus has to do with Mayan astronomy, but if I must I can also shed... | <urn:uuid:106b2625-dee4-4685-924d-a39a282f902d> | 2.890625 | 575 | Comment Section | Science & Tech. | 68.278 |
This problem is about investigating whether it is possible to start at one vertex of a platonic solid and visit every other vertex once only returning to the vertex you started at.
A Hamiltonian circuit is a continuous path in a graph that passes through each of the vertices exactly once and returns to the start.
How m... | <urn:uuid:c904279d-922c-4309-b185-419a6b19c2a2> | 2.953125 | 638 | Comment Section | Science & Tech. | 52.69048 |
This is consistent with there not being enough space (20 Å) for two purines to fit within the helix and too much space for two pyrimidines to get close enough to each other to form hydrogen bonds between them.
But why not A with C and G with T?
The answer: only with A & T and with C & G are there opportunities to estab... | <urn:uuid:462b58b0-0cf8-46f1-89ec-bb1043beb45e> | 4.28125 | 253 | Knowledge Article | Science & Tech. | 47.382381 |
Do a binary search for a given value within a character string array, accompanied by an order vector. Return the index of the matching array entry, or -1 if the key value is not found.
VARIABLE I/O DESCRIPTION -------- --- -------------------------------------------------- value I Key value to be found in array. ndim I... | <urn:uuid:bc02b943-9765-4d6a-ae3d-0373ed6146c9> | 3.390625 | 911 | Documentation | Software Dev. | 66.813673 |
In order to fully understand long-term climate changes, analyses of observed and model-simulated climate changes, especially aspects related to the global hydrological cycle should be given due dilligence. Such aspects include: changes in atmospheric and near-surface water vapor, humidity, cloudiness, precipitation amo... | <urn:uuid:8b3e5e59-22dc-435b-9a94-d02c70d97356> | 2.796875 | 1,553 | Knowledge Article | Science & Tech. | 84.209743 |
|Ivars Peterson's MathTrek|
October 27, 1997
Recreational mathematics furnishes a vast playing field for amateur and professional mathematicians alike. It combines a sense of play with the joy of discovery. Sometimes the results are mathematically trivial; occasionally they lead to new mathematical insights.
Whole numb... | <urn:uuid:1cda513c-4fb1-402f-810c-0beaf8a4fb23> | 2.78125 | 932 | Knowledge Article | Science & Tech. | 50.534415 |
Groundwater exists in an underground stratum of porous rock (aquifer). Groundwater and surface water are closely linked; water pumped onto uplands from a surface source will ultimately enter groundwater. Overexploitation of ground water can lead to saline intrusions and land subsidence. Successfully managing groundwate... | <urn:uuid:b219e4c6-e3e7-4ed1-8095-e41eea8b6c97> | 3.203125 | 145 | Tutorial | Science & Tech. | 25.873409 |
August 01st, 2011
Take a closer look at the world's oldest fossils of carrion beetles and experience a unique view of these 165 million-year old fossils.
July 18th, 2011
In this episode, speak with Dr. Lance Grande about his research on the fossils of the Green River Formation – a 52 million year old fossil lake bed in... | <urn:uuid:b2fcfd15-6974-4cef-8666-2d5e113eb5a7> | 3.015625 | 400 | Content Listing | Science & Tech. | 46.33423 |
Twelve months ago, this was one of our images of 2011.
It’s a Flame Shell, a ‘cryptic’ marine species with bright orange feeding tentacles. It is found only in a a very few west coast locations. This one was photographed in 2011 [© SNH] in flame shell beds in Loch Linnhe in Argyll, during one of 15 marine surveys carri... | <urn:uuid:9aadad69-cf2d-48a7-a385-c716b7c0823f> | 3.09375 | 225 | Personal Blog | Science & Tech. | 53.828978 |
Credit: NASA/CXC/U.Manitoba/H.Matheson & S.Safi-Harb
Finding a Crab's Shell
Sometimes it's what's on the outside that counts. This seems to be the case with G21.5-0.9, a supernova remnant identified 30 years ago by radio astronomers. G21.5-0.9 is (or was) a mysterious member of the class of so-called "Crab-like" (or pl... | <urn:uuid:6b8f123f-431e-4cdf-9e0a-30f7c792d182> | 3.4375 | 334 | Knowledge Article | Science & Tech. | 74.105375 |
Global Warming: Global warming is defined as the increase of the average temperature on Earth. As the Earth is getting hotter, disasters like hurricanes, droughts and floods are getting more frequent.
Cause of global warming: Almost 100% of the observed temperature increase over the last 50 years has been due to the in... | <urn:uuid:c4018019-311d-414c-9ace-cb161deeba80> | 4.0625 | 1,205 | Knowledge Article | Science & Tech. | 35.897767 |
Quarterdeck Volume 4, Number 1, Spring 1996
World Ocean Circulation Experiment
Studying the ocean's role in climate change
Carri T. Hill
Climate variability affects our daily lives. Economic and social impacts of climate anomalies such as the recent cold weather in the northeast United States or the flooding in Oregon ... | <urn:uuid:81c6a610-a65c-4a7e-820d-2401c40020ca> | 3.71875 | 1,710 | Academic Writing | Science & Tech. | 39.856804 |
After an accelerator has pumped enough energy
into its particles, they collide
either with a target or each other. Each of these collisions is called an
event. The physicist's goal is to isolate each event,
collect data from
it, and check whether the particle processes of that event agree with the
theory they are testi... | <urn:uuid:a590c960-41c0-4f22-bc55-7a49fc23f7da> | 3.328125 | 137 | Knowledge Article | Science & Tech. | 34.100743 |
enum type signed or unsigned? Is the Signedness of enums differ in C/C99/ANSI C/C++/C++x/GNU C/ GNU C99?
An enum is guaranteed to be represented by an integer, but the actual type (and its signedness) is implementation-dependent.
You can force an enumeration to be represented by a signed type by giving one of the enume... | <urn:uuid:ff243d88-6525-4fb9-a059-1ca65a759e22> | 2.828125 | 158 | Q&A Forum | Software Dev. | 40.78 |
21st Century : Science : SETI@home
Are we alone in the Universe? This is the question which has baffled and fascinated mankind for centuries. One only has to look at the plethora of popular Science Fiction TV shows and films to see that we are fascinated by the idea of other intelligent life "out there".We still have n... | <urn:uuid:8614451e-eb7a-4f81-802d-e9339ffee95b> | 3.15625 | 646 | Knowledge Article | Science & Tech. | 49.904825 |
Read what our writers around the world are saying about climate change.
...or have your own say in the Celsias Lounge »
March 2012 set records for warm temperatures that promoted early leafing and flowering across large areas of the United States. A team of scientists at the USA National Phenology Network, which is spo... | <urn:uuid:44d829ab-e731-4e2a-9d3b-9bf656ba2711> | 3 | 678 | Content Listing | Science & Tech. | 55.029223 |
Here is a good site that has some very cool infor about XAML. XAML.NET They have a very nicely worded definition on their main page which I will include here. I hope that they don't mind my posting their content directly. I definitely recommend their site for finding good XAML info. i strongly recommend for folks to ge... | <urn:uuid:f3a8c804-2b2a-4aa6-82b5-fc62ae277d30> | 3.3125 | 287 | Comment Section | Software Dev. | 38.549231 |
Discovered on January 23, 1779 by Charles Messier.
[From: Memoir on the Comet of 1779, Mem. Acad. for 1779, p. 318-372
+ Pl. XIV. Discovery announce of M56, p. 320]
On the 19th [of January, 1779], when observing the Comet [C/1779 A1 Bode, Messier's 17th comet], I saw at little distance of it, & on its parallel, a very ... | <urn:uuid:f781df7a-823b-453f-b841-9079aebeb986> | 3.234375 | 924 | Knowledge Article | Science & Tech. | 97.480399 |
Since pointers are variables themselves, they can be stored in arrays just as other variables can.This is just one aspect of the generality of C's data types, which we'll be seeing in the next few sections.
We've used a recursive definition of ``expression'': a constant or variable is an expression, an expression in pa... | <urn:uuid:7ca4eeb0-cbd3-49ab-b4c9-c05ba089ee64> | 3.515625 | 2,347 | Documentation | Software Dev. | 54.195975 |
is a functional group
consisting of oxygen
It has a charge (oxidation number) of -1 unit.
The term hydroxyl group is used when the functional group -OH is counted as a substituent of an organic compound. Organic molecules containing a hydroxyl group are known as alcohols.
Hydroxide is one of the simplest of the polyato... | <urn:uuid:4d176ae2-5c25-46a8-8f60-90dbea313bdf> | 2.953125 | 98 | Knowledge Article | Science & Tech. | 42.019304 |
Choose one of the following Minerals for more details:
Crystal formations such as this grow out of mineral-rich solutions in spacious rock cavities. When the solution becomes saturated, crystals begin to form on rock walls, on other crystals, or even on particles of dust. They grow quickly or slowly--or stop--depending... | <urn:uuid:944b4013-8d7c-49f6-819c-8e35de60ca23> | 2.90625 | 115 | Knowledge Article | Science & Tech. | 43.70325 |
Acid Rain Lesson Plan
Activity 1 – the pH Scale
Time: 1 Hour
At the end of this lesson the student will be able to:
- Describe the pH scale and its components
- Explain why a pH measurement must be accurate and why small changes in pH are important.
You will need enough of the following for each student:
- Dried aprico... | <urn:uuid:b6145d4a-3770-48c2-a132-f1b174f4d24e> | 3.921875 | 284 | Tutorial | Science & Tech. | 72.035029 |
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Mechanics: Vectors and Projectiles
Vectors and Projectiles: Audio Guided Solution
The takeoff speed of a military aircraft from an aircraft carrier is approximately 170 mi/hr relative to the air. They acquire this speed through a combination of a catapult system present on the aircraft carrier and the aircraft's jet pr... | <urn:uuid:a40e2bac-0a11-4a01-827d-d8f1a339e0ed> | 3.296875 | 333 | Tutorial | Science & Tech. | 56.556909 |
Jan. 21, 2010 Dunes of sand-sized materials have been trapped on the floors of many Martian craters. This view shows dunes inside a crater in Noachis Terra, west of the giant Hellas impact basin in Mars' southern hemisphere.
The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Or... | <urn:uuid:9cea5201-efd6-47f5-94e3-4d804c10b06e> | 3.796875 | 373 | Truncated | Science & Tech. | 40.363699 |
First, fusion's only bi-product is hydrogen, which cannot be radioactive (Its atoms aren't big enough to be unstable)- however, after billions of dollars of research, we've failed to produce 1kw from the thing.
The risk from nuclear powerplants isn't too bad if we take necissary precautions (like using deionized H2O in... | <urn:uuid:e9b89589-a7d6-4beb-9f02-fe4786d03156> | 3.09375 | 384 | Comment Section | Science & Tech. | 58.474466 |