what was matter, and what was it composed by, he then goes on to talk about the first proof of matter, which was made in 1803 by John Dalton who said that the behavior of chemical compounds could be explained by the bond of atoms into molecules. Then, with advanced technology, atoms were confirmed and were later explained to be composed of smaller pieces called quarks, there are six flavors of quark that come in three colors and are either up or down. Stephen Hawking then goes on to introduce the four fundamental forces that are categorized by their strength and the interactions they have with particles that have mass in them. The first one is gravitational force, this one is consist ent with Newton’s law, and is the lowest one at the quantum level, but this force is always attractive over great distances at the relativity level. The second one is electromagnetic force, which is the strongest one, this one interacts with charged particles and these may attract or repulse. The third one is weak nuclear force, which is responsible for radioactivity, then you have the fourth force which is strong nuclear force, which is responsible
4 for holding subatomic particles together. In conclusion, in these five chapters, Hawking explained and introduced the basic terms that have to do with the universe, he explains it in such a way that anybody that is not familiar with the terms can read and understand the book with no problem at all. Hawking explai ned many theories, that I personally didn’t understand, with easy examples and with basic words, he talked about how theories are disproven but never indefinitely proved, and he talked about many things that I had no idea before reading the book what they meant.
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- Fall '16
- Samuel Bisono