ronniebasak22 2012-05-07 14:36:32
I'm Going to Write some Misconceptions perhaps you know........
If you know the fact, or it is kinda boring for u, please stay quite, dont flood my topic, my topic will NOT hurt any1...
NERO DIDN'T FIDDLED ON THE GREAT FIRE OF ROME:
Nero did not "fiddle" during the Great Fire of Rome (violins had not yet been invented, nor was he playing the lyre). In fact, according to Roman historian Tacitus, upon hearing news of the fire, Nero rushed back to Rome to organize a relief effort, which he paid for from his own funds, and he also opened his palaces to provide shelter for the homeless, arranging for food supplies to be delivered in order to prevent starvation among the survivors. Finally, he made a new urban development plan that attempted to make it more difficult for fires to spread.
GREAT WALL OF CHINA IS NOT VISIBLE FROM MOON
It is commonly claimed that the Great Wall of China is the only human-made object visible from the Moon. This is false. None of the Apollo astronauts reported seeing any specific human-made object from the Moon, and even Earth-orbiting astronauts can barely see it. City lights, however, are easily visible on the night side of Earth from orbit. The misconception is believed to have been popularized by Richard Halliburton decades before the first moon landing. Shuttle astronaut Jay Apt has been quoted as saying that "the Great Wall is almost invisible from only 180 miles up."
MISCONCEPTION : BLACK HOLES
Black holes, contrary to their common image, do not necessarily suck up all the matter in the vicinity. The collapse of a star into a black hole is an explosive process, which means, according to mass–energy equivalence, that the resulting black hole would be of lower mass than its parent object, and actually have a weaker gravitational pull. The source of the confusion comes from the fact that a black hole exists in a space much smaller than a star but is orders of magnitude more dense, causing its gravitational pull to be much stronger near to its surface. But, as an example, were the Sun to be replaced by a black hole of the same mass, then the orbits of all the planets surrounding it would be unaffected. This is because "if you're outside the event horizon, you can just keep going around in circles around [a black hole], in exactly the same way that you can be in orbit around any other kind of mass."
Meteorites are not necessarily hot when they reach the Earth. In fact, many meteorites are found with frost on them. Meteorites as they enter the earths atmosphere have been warmed only by the sun, and will be a little cooler than freezing. This is due to the meteorite being in radiative equilibrium. A meteor's great speed is enough to melt its outside layer, but any molten metal will be quickly blown off, and the interior of the meteor does not have time to heat up because rocks are poor conductors of heat. Also, atmospheric drag can slow small meteors to terminal velocity by the time they hit the ground, giving them time to cool down.
Pathania 2012-05-07 15:15:27
Ronnie, meteorites burns or melts becoz of high speed and friction of air. Same applied in aeronautical science,when space shuttle enters in earth atmosphere, it floats in 'S' slope to avoid direct friction with air.
Black hole presence can be detected with revolvation of other stars or object near it. Stars which r larger in mass than sun converts into black hole. And stars like sun or smaller in mass than it converts in neutron stars and radiates pulsar waves. It's not possible to see black hole as it can be smaller as tip of pen.