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- Sofia Kovalevskaya (3306 bytes)
1: ...]]) was a [[Russia]]n [[mathematician]] and a student of [[Karl Weierstrass]] in [[Berlin]]. In [[188...
3: ...ged to convince the Russians to list him as descended of aristocracy, a Hungarian king in particular; ...
5: ...) via [[Fyodor Fyodorovich Schubert]] (another Academician) and had more education and "appreciation o...
7: ...aya contributed to the understanding of [[partial differential equation]]s (the [[Cauchy-Kovalevskaya theorem]])...
9: ...to get his attention, but he was focused on the older sister Anna and he very probably proposed to her... - Earth (30908 bytes)
4: ...iker's Guide reference in here. It's been done to death. Find a gem with which to improve the article ...
7: ...l planet]]s, and the only planetary body that [[modern science]] confirms as harboring [[life]]. The p...
9: ... a variant puts the cross atop the circle ([[Unicode]]: ⊕ or ♁).
14: ... diameter of approximately 12,742 km. The maximum deviations from this are the highest point on Earth ...
17: ... other [[terrestrial planets]], is chemically divided into an outer [[silicon|siliceous]] solid [[Crus... - Timeline of invention (28171 bytes)
3: ...s ambiguity, the date of the first practical, fielded version of the invention is used here.
60: * [[Odometer]] : [[Ancient Rome|Rome]]: [[Archimedes]]?
66: ...ntury BC|200s BC]]: Compound [[pulley]]: [[Archimedes]]
74: * [[1st century]]: [[Rudder|Stern mounted rudder]] in [[History of China|China]]
83: * [[9th century|800s]]: [[Black powder|Gunpowder]] in [[History of China|China]] - Sun (20830 bytes)
2: ...="margin: 0 0 1em 1em; border: 1px #aaa solid; border-collapse: collapse;" align="right" width=280px
13: ! align="left" | [[Apparent magnitude|Visual brightness]] (''V'')
16: ! align="left" | [[Absolute magnitude]]
48: ! align="left" | Density
76: | 7.25[[degree (angle)|?]] <br>(to the [[ecliptic]]) <br>67.... - Meteorology (19082 bytes)
12: ...d in [[1667]] by [[Robert Hooke]], while [[Horace de Saussure]] completed this list of the most import...
14: ... was also the first American to keep accurate and detailed records of weather conditions on a daily ba...
16: ...s was understood. Early in the 20th century this deflecting force was named after [[Gaspard-Gustave C...
18: ...lowed exchange of weather information with unprecedented speed.
20: ... [[front (meteorology)|front]]s, that is, sharply defined boundaries between air masses. - Isaac Newton (23339 bytes)
2: ...ottfried Wilhelm Leibniz]] for the development of differential [[calculus]]. While they both discovered calculus...
4: ...a prism was inherent in the white light and not added by the prism as [[Roger Bacon]] had claimed in t...
6: ...ped a [[Newton's law of cooling|law of cooling]], describing the rate of cooling of objects when expos...
12: ...ief biography of Newton's early life. For more in-depth information, see [[Isaac Newton's early life a...
14: ... said that his body at that time can even fit inside a quart mug. His father had died three months bef... - Evolution (27661 bytes)
3: ...[[genetics]] in the [[1940s]], evolution has been defined more specifically as a change in the frequen...
6: ...e the [[modern evolutionary synthesis]]. In the modern synthesis, "evolution" means a change in the fr...
8: ...share a common ancestor. It also is often used to describe the mechanisms through which evolution acts...
12: The theory underlying the modern synthesis has three major aspects:
14: # The [[common descent]] of all [[organism]]s from a single ancesto... - Jupiter (24639 bytes)
1: ...="margin: 0 0 1em 1em; border: 1px #aaa solid; border-collapse: collapse; font-size: 95%;" align="righ...
4: ...]]<br/><small><font color="white">Click image for description</font></small>
39: | 1.305 30°<br>(6.09? to [[Sun]]'s equator)
41: ...e ascending node|Longitude of the<br> ascending node]]
42: | 100.556 15° - Mathematics (24164 bytes)
1: ...ty]], [[structure]], [[space]] and [[change]]. It developed, through the use of [[abstraction]] and [[...
3: ...nowledge. This latter meaning of mathematics includes the mathematics used to do [[calculation]]s and ...
10: However, mathematics undoubtedly could not have developed out of simple counting and arithmetic with...
15: ...]] and later [[astronomy]]. Nowadays, mathematics derives much inspiration from the natural sciences a...
17: ...as happened that pure mathematics, which was considered only of interest to mathematics, has become ap... - Geologic fault (2738 bytes)
1: ... [[Crust (geology)|crust]] that are the result of differential motion within the crust. Faults are the source of...
3: ... of the fault as it was active which must be considered, and not the present day orientation, which ma...
8: ...nal [[tectonic]] significance may be designated [[detachment fault]]s.
19: ...ose with right-lateral motion are also known as ''dextral'' faults. A special class of strike-slip fau... - Seismograph (4037 bytes)
6: ...cord both S and P waves, but those on the other side of the Earth can only record P waves.
10: ==Design==
12: ...o the mass, an amplifying device, and a recording device.
18: A popular modern design uses strain-beam accelerometers constructed a...
20: ...r amateurs, a PC with a recording sound card provides a computer with an inexpensive analog-to-digital... - Computer (32773 bytes)
3: ...mputer program|programming]]) a computer can be made to represent some aspect of a problem or part of ...
4: The discipline which studies the theory, design, and application of computers is called '''[...
8: ...s, photons, quantum particles or any other well-understood physical phenomenon. Although computers ha...
10: .... For example, electron flows might be used to model the flow of water in a dam. Such ''[[analog sig...
12: ...is first translated into mathematical terms by rendering all relevant information into the [[binary]] ... - Tricycle (4572 bytes)
5: ...motorcycle]]s (however, [[sidecar]]s are not considered tricycles, neither are the three wheeled autom...
7: ...being at one end, tadpoles always understeer, and deltas always oversteer.
9: ... Higgins and Pashley are the principal makers of 'delta' pattern upright trikes in the UK. Most tadpo...
11: ... corners much as a bicycle does, and this also renders them more comfortable on cambered roads. They ...
13: ...r use. These are known as [[velomobile]]s. Other designers try to reduce the number of parts, especia... - Helicopter (20080 bytes)
1: ...b>fixed-wing aircraft</b>. The word helicopter is derived from the [[Greek language|Greek]] words ''he...
3: ...] Company (USA) [[Robinson R44|R44]], a four seat development of the [[Robinson R22|R22]].]]
5: ...ject only to refuelling facilities and load/altitude limitations, a helicopter can travel to any locat...
9: ...ransportation, casualty evacuation (including [[MEDEVAC]], and [[search and rescue|air/sea/mountain re...
13: ...ry AD]] book in China that described some of the ideas in a rotary wing aircraft. - Hybrid vehicle (47544 bytes)
3: ... Wheel]] Bus, a hybrid bus with an in wheel motor design. |300px]]
6: ...ference between a motor and a generator is one of design optimization only. ''See also [[motor-genera...
8: ...In the [[import scene]], hybrid was often used to describe an [[engine swap]], such as the common Hond...
12: ...l | accessdate=May 15 | accessyear=2000}} never made it into production as the program was replaced by...
14: ...[[nuclear power]], which can operate underwater indefinitely, though a number of nations continue to r... - Economy of Estonia (6977 bytes)
3: ... major trading partners. The high current account deficit remains a concern, although the economy has ...
6: ...s, the government confiscated the estates and divided them into small farms which subsequently formed ...
8: ... of Estonia]], the country's [[central bank]]. Trade focused on the local market and the West, particu...
10: ...ccess and greater prosperity than other regions under Soviet rule.
12: ...a's free-market-based economy. Estonia also has made excellent progress in regard to [[structural adju... - Tobacco smoking (36030 bytes)
2: ...ly [[lung cancer]], [[emphysema]], and other disorders.
4: ...alth hazards of smoking, the practice has rapidly declined in recent years in the [[United States]], [...
8: ..."as addictive as heroin or cocaine."{{fn|1}} Dependence is strongest when tobacco smoke is inhaled int...
10: ...s balanced by its immediate rewards, while others deny the risks altogether.
13: ...co was used as an all-purpose medicine, and was widely believed to have magical powers, It was also bu... - Yellowstone National Park (23738 bytes)
1: <table border="1" cellpadding="2" cellspacing="0" align="right...
6: <tr><td>''Designation''</td>
25: ..., and [[Wyoming]]. Yellowstone is the first and oldest [[national park]] in the world and covers 3,470...
27: ...f these changes could have resulted in the worldwide population of humans falling to as little as 10,0...
29: ...en in the [[Grand Canyon of the Yellowstone]] - a deep gash in the Yellowstone Plateau that was formed... - Death Valley National Park (38245 bytes)
1: ... Bush]], [[Bighorn Sheep]], [[Coyote]], and the [[Death Valley Pupfish]] - a survivor of much wetter t...
3: ...ational Park, as well as being substantially expanded.
5: ...1700 million years old. Ancient warm-shallow seas deposited marine sediments until rifting opened the ...
6: ...|A slice through the highest and lowest points in Death Valley National Park.]]
8: ...age:Wpdms shdrlfi020l death valley.jpg|frame|left|Death Valley and environs]] - Metamorphic rock (7141 bytes)
1: ...sedimentary rock]], [[igneous rock]] or another older metamorphic rock.
3: ...ssembly ([[metamorphic facies]]). They are formed deep beneath the Earth's surface by great stresses a...
5: ...he temperatures and pressures that occur at great depths within the Earth's crust.
10: ... the process of metamorphism. These minerals include [[kyanite]], [[staurolite]], [[sillimanite]], [[a...
18: ... the direction of the force. This results in a banded, or foliated, rock, with the bands showing the c...
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