the antartic circle facts help me please?
965624
At the antartic circle, the sun never sets.\n\nThe antarctic circle is on the continent of antarctica.\n\nCompasses do not work within the antarctic circle.\n\nNo stars are visible in the antarctic circle.
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Let E be the raduis of the earth\nLet r be the actual radius of the circle in the plane\nLet S be the radius of the circle on the sphere\nLet θ be the angular separation of the centre of the circle on the sphere to the circle in degrees\n\nThus θ = πθ/180 radians\n\nThen C = 2πr\nr = E*sinθ → C = 2πE*sinθ\nAlso S = E*πθ/180 → E = 180*S/(πθ)\n\nThus C = 2π*sinθ*180*S/(πθ)\nie C = 360Ssinθ/θ \nwhere S = radius on sphere and θ is the angular separation (at the centre of the sphere) between the centre of the circle and any point on its circumference, expressed in degrees
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You may want to be more specific on this one... are you trying to find the largest possible area? You can inscribe lots of different trapezoids in a circle. \n\nAnd which theta are we talking about? The angle that the base makes with the circle?\n\nTry that one again,\n\nUMRmathmajor
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check out http://www.answers.com/center%20of%20earth
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1. Increase.\n\n2. More massive (moocow is right)\n\n3. 18 degrees.\n\n4. About 30 arcminutes (1 degree = 60 arcminutes) (moocow is right)\n\n5. 40 degrees.\n\n6. The Celestial Equator (I disagree with moocow on this one, you can't move parallel to a point).\n\n7. False. (I disagree with moocow on this one, It is the ROTATION on it's axis, not it's REVOLUTION around the Sun).\n\n8. At the south pole.\n\n9. The equator (moocow is right)\n\n10. Below, because more of the earth is in your line of sight. (moocow is right)\n\n11. Yes.\n\n12. Yes.
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(a) The angular speed of the earth is the circumference of the orbit divided by the time taken to complete one orbit.\n\nAngular speed = (2*pi rad) / 3.16x10^7s = 1.987x10^-7 rad/s. \n\n(b) The tangential speed is the same as the angular speed, but in different units (probably m/s).\n\n1 rev/yr * (1/3.16x10^7) yrs * (2*pi*r)m/rev = 29810 m/s\n\n(c) The magnitude of the centripetal acceleration is the radius times the angular speed squared.\n\na = r*w^2 = 1.50x10^11 * (1.987x10^-7)^2 = 5.924x10^-3 m/s^2\n\nThe direction is toward the sun.
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Earth is an oblate spheroid, resembling a sphere flattened at the poles.\n\nThe volume of an oblate spheroid is\n\n    V = 4/3 X 3.14 X a^2 X b\n\nwhere π is the mathematical constant pi, and a and b are the equatorial and polar radii.\n\nSubstituting a = 6,378,135 m and b = 6,356,750 m\n\nThe Huge EarthThe mean radius of the earth is approximately 6.4 million meters (exact = 6.37 x 106 m). Its volume is then:\n\n(4/3) x 3.14 x 64000003 m3\n\nThis comes to 1,097,509,500,000,000,000,000 cubic meters.
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exact postion in this table:\nhttp://www.heavens-above.com/planetsummary.asp?lat=50.450&lng=-104.617&alt=0&loc=Regina&TZ=Sask\nor get it visually on this virtual planatarium:\nhttp://www.fourmilab.ch/yoursky/
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its a "sphere" so to speak...so it does have a radius..\n\nthe problem is that since it spins, its a bit wider at the equator..so you need to specify the radius at that location or the polar radius...\n\nmost ppl care about the equatorial radius.\n\nthe Earth's equatorial radius, or semi-major axis, is the distance from its centre to the equator and equals 6,378.135 km (≈3,963.189 mi; ≈3,443.917 nmi).
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Earth\n\n In our Solar System , planet Earth is the third in distance from the Sun and the fifth largest in diameter. The mean distance of the Earth from the Sun is 149,503,000 km, and radius varies from 6378 km in the equator to 6356 km in polar direction. It is the only planet known to support (intelligent) life, although some of the other planets have atmospheres and contain water (it has been shown lately that there could have been some life in ancient Mars!)\nFor the space physicist, the most important aspect of the Earth is that it behaves as an enormous magnet. The English physician and natural philosopher William Gilbert was the first to demonstrate this similarity in about 1600, although the effects of terrestrial magnetism had been utilized much earlier in primitive compasses. In first order the magnetic field created by this magnet is that of a dipole whose axis is tilted with respect to the spin axis by about 11 degrees. The north magnetic pole is presently located off the western coast of Bathurst Island, in the Canadian Northwest Territories, almost 1290 km northwest of Hudson Bay. The south magnetic pole is presently situated at the edge of the Antarctic continent in Adélie Land about 1930 km northeast of Little America. The magnetic field points down towards the surface of the Earth in the northern hemisphere, and away from it in the southern hemisphere. The difference between the dipole axis and geographic axis is one of the reasons why there are so many different coordinate systems needed to describe locations in space around the Earth.\n\nThe area around the Earth governed by its magnetic field is called the magnetosphere . The properties of the magnetosphere are strongly affected by the solar wind . The interaction between the solar wind and the magnetosphere is important in space physics.
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SUN\n        diameter:    1,390,000 km.\n        mass:        1.989e30 kg\n        temperature: 5800 K (surface)\n                     15,600,000 K (core)\n\nMercury \n        orbit:    57,910,000 km (0.38 AU) from Sun\n        diameter: 4,880 km\n        mass:     3.30e23 kg\n\nVenus \n        orbit:    108,200,000 km (0.72 AU) from Sun\n        diameter: 12,103.6 km\n        mass:     4.869e24 kg\n\nEarth \n        orbit:    149,600,000 km (1.00 AU) from Sun\n        diameter: 12,756.3 km\n        mass:     5.972e24 kg\nMars \n      orbit: 227,940,000 km (1.52 AU) from Sun\n      diameter: 6,794 km\n      mass: 6.4219e23 kg\n\nJupiter \n        orbit:    778,330,000 km (5.20 AU) from Sun\n        diameter: 142,984 km (equatorial)\n        mass:     1.900e27 kg\n\nSaturn\n        orbit:    1,429,400,000 km (9.54 AU) from Sun\n        diameter: 120,536 km (equatorial)\n        mass:     5.68e26 kg\n\nUranus \n        orbit:    2,870,990,000 km (19.218 AU) from Sun\n        diameter: 51,118 km (equatorial)\n        mass:     8.683e25 kg\n\nNeptune \n        orbit:    4,504,000,000 km (30.06 AU) from Sun\n        diameter: 49,532 km (equatorial)\n        mass:     1.0247e26 kg\n\nPluto \n        orbit:    5,913,520,000 km (39.5 AU) from the Sun (average)\n        diameter: 2274 km\n        mass:     1.27e22 kg\n --------------------------------------------------\n............ Distance... ..Radius. ..Mass.\n.Name....... (000 km)... .(km).... .(kg)..\n------------- ----------- ---------- -------\nSun............0..... .697000. .1.99e30\nMercury.......57910.. ...2439. .3.30e23 +\nVenus........108200.. ...6052. .4.87e24\nEarth........149600.. ...6378. .5.98e24\nMars.........227940.. ...3398. .6.42e23\nJupiter......778000.. ..71492. .1.90e27\nSaturn......1429000.. ..60268. .5.69e26\nUranus......2870990.. ..25559. .8.69e25 *\nNeptune.....4504300.. ..24764. .1.02e26 *\nPluto.......5913520.. ...1160. .1.32e22
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Join the real world and study the scientific facts on the website below.\n\nhttp://www.badastronomy.com/bad/tv/foxapollo.html\n\nHOTFLASH..!!!!\nThe earth isn't flat, and the sun always rises in the east
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Well the earth orbit's the sun \n2AU * PI / year\n\nAn AU is the average distance of the Earth from the sun in it's orbit.  Although all orbit's are ellipses, the equation of a circle should approximate close enough.\n\n1AU =149.598×10^6 km.\n2AU = 299196000 km \n\nThe earth moves really fast so we should convert years into seconds.  The earth orbits the sun once about every 365.25 days (the .25 is why we have leap years).\n\n365.25 * 24 * 60 * 60 = 31557600 seconds.\n\nSo now all we must figure out to get the speed in km/sec we calculate \n(299196000 * PI) / 31557600\n=29.785280109497\n\nSo the Earth orbits the sun at a speed of 29.785280109497 km/sec.  That's pretty fast!\n\nWikipedia gives a max orbital speed of 29.783 km/sec and a min orbital speed of 29.291 km/sec, so my estimate was pretty darn close.
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Hey there, I've looked it up and the funny fact is that it doesn't belong to another country : \n\nAs the only uninhabited continent, Antarctica has no government and belongs to no country. Various countries claim areas of it, but most other countries do not recognize those claims\nhttp://66.249.93.104/search?q=cache:Ci-ojR9Pn6gJ:en.wikipedia.org/wiki/Antarctica+antartica+belongs+to&hl=nl&gl=be&ct=clnk&cd=1
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Above the Arctic circle, the Sun shines all day or sets for a short period of time during the Northern hemisphere summer.\nBelow the Antarctic circle, same but during the Southern Hemisphere summer.
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Equator!\n\nThe Arctic Circle is in the North.  The Tropic of Capricorn is in the South.  So the Equator is between them.
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1. the surface is colder than the atmoshpere.\n2. it is about 1/2 of the way through its life span.\n3. its size is such that it could explode as a nova, or just collapse into a white dwarf.\n4. sun spots produce alot of electrical activity, and are a cause of solar flares.\n5. The sun is relatively small compared to most other stars.\n6. The outside of the sun (corona) reaches tempuratures of 27,000,000 degrees fahrenheit.\ni cant seem to scratch my brain for anything more.\nmight i suggest google.com?