Black holes - Oral presentation Eng 6 PDF

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Black holes English - oral presentation.

Introduction Have you ever wondered what black holes really are and how they exist. Most people believe that they are only “black invisible holes spinning in space that sucks up all things surrounding it.” But that’s not completely true. So what is a black hole?

What is a black hole? Black holes is a place where gravity has gotten really strong so that the escape velocity is faster than light. That means that

How does black holes form? The common way a black hole is formed is probably in a supernova. A supernova is a star that has gotten around 25 times the mass of the sun, it will explode. When it explodes, the outer part of the star spreads outward while the inner part (core) collapses if there is enough mass.

The discovery of Black holes The black holes were predicted by Albert Einstein in 1916 with his general theory of relativity. His theory was hard to prove and it took Albert Einstein ten years to work out the math that required using a daunting form of mathematics called tensor calculus. However Albert Einstein was not able to get the exact answer of all of his equations and even the smartest scientifics at that time could not solve it. Until a theoretical physical, close to Einstein's, named Karl Schwarzschild succeeded in solving the equations. He was fascinated by Albert Einstein articles about general relativity that were published in 1915 and he later succeeded in completing the calculations. Shortly before his death in 1916 he were able to complete his work and later the same year articles about it were published, titled: On the Field of Gravity of a Point Mass in the Theory of Einstein.

What happens when you fall into a black hole? If you ever fall into a black hole, your domed. Once you fall into the black hole you can never get out again and you would even be dead before you get there. The gravity of the black holes is so strong that it will stretch you and pull you apart. When you have reached the black hole you will be a mile long, thin stream. The scientists call this “spaghettification.”.

Can black holes be used to time-travel? Many have probably seen time traveling in fictional movies by traveling through black holes. In reality this probably will not work. However there is a theory that a black hole can form a tunnel in space, called a wormhole. Through the wormhole you would be able to travel to another place in space, maybe another galaxy or planet. But this is still a theory not proven to be true....