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Soal Fisika Bg. 2

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Encyclopedia:
Al-Kindi
Al-Kindi (يعقوب بن اسحاق الكندي) (born: 801 - died: 873), could be said was the first philosopher who was born from Islamic circles. During his life, besides can speak Arabic, he is also fluent in Greek. Many of the works of philosophers Yunaniditerjemahkannya in Arabic, among other works of Plotinus Aristotelesdan. Unfortunately there is a work that translated Plotinus as essays by Aristotle and berjudulkan Theology of Aristotle, so that in future there is little confusion.

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Encyclo:
Archimedes
Greece, 287-212 BC

Archimedes learn the mathematics, physics and has made many discoveries. He discovered the principle of the lever that can move heavy objects with little effort. He demonstrated this principle by moving the vessel by means of a lever. Eucildes said, "When I was given a long enough lever, and leverage point, I can move the earth."

Euclid uses the knowledge of density to find that the crown made for the king was not made with pure gold. He also studied the circle and find a formula for the circumference of a circle (2πr) and area of a circle (πr2).

In a saga as old Archimedes, the Greek was defeated by the Romans. When the enemy soldiers into his home and he was studying in my room that drew a circle on the floor, he shouted, "Do not walk all over my ring!" But the soldiers did not care about Archimedes shouting instead stabbed him to death.

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Encyclo:
Pythagoras
Greece, 582-493 BC

Although Pythagoras was a philosopher, but he also studied music and other sciences. He was born in Greece and then to Egypt and Babylonia to learn.

Pythagoras is famous theses explaining that in a right triangle, the square of the hypotenuse equals the sum square of the other sides. Right-angled triangle which sides are proportional to 3: 4: 5 is the basis of mathematical theorem to calculate the angles in a triangle a2 + b2 = c2 and was first used by skelter rope in Egypt to the ground with ropes bersimpul. According to legend, he found the proposition that when he was studying composition bersegitiga floor at the home of a friend.

In another story, when he was passing through a smithy he got the idea from different types of sound produced by a hammer blow. That the shorter the handle of the hammer higher frequency tones are generated. Using this idea he was creating the kinds of harps and flutes.