Note Taking - The Cornell System

Process of nuclear fusion release enormous about of energy It is a nuclear reaction where two atoms collide at a very high speed and join two crate a new type of atom .It needs two atomic nuclei to make a large nucleus it needs energy to make this happen though. Things that use this reaction are the sun and the stars to release energy.

Nuclear fusion is a form of nuclear reaction which occurs when two or more atomic nuclei collide at a very high speed and as a result, join to form a new type of atomic nucleus. During this process, matter is not conserved because some of the mass of the fusing nuclei is converted into energy. Fusion is currently the process that powers active stars.

In the modern world, nuclear fission is the fundamental process of a nuclear bomb and nuclear reactor. The reaction produces a chain reaction of atom splitting that produces 24,000,000 kilowatts per hour of energy. On the other hand, nuclear fusion is a reaction where two or more nuclei come close enough to one another to create one or more atomic nuclei and subatomic nuclei. As a result, this reaction produces a massive amount of energy; fusion reaction is the energy source of the sun, the energy produced by fusion is the answer to why the sun is hot.

August, 1939, Albert Einstein was residing in a Nazi occupied Germany. Upon discovering that Germany was in the process of researching and developing nuclear-based weapons, he partnered with Edward Teller,

Before the Manhattan Project, in the beginning there were many advancements in understanding made in the world of physics. These resulted in the recognition of nuclear fission and its potential as an energy source and as a potential weapon. Of these advancements none was more central and important than the development of the nuclear model of the atom, which by the year of 1932 contained a nucleus containing most of the mass of an atom in the form of two particles, protons and neutrons. This nucleus was surrounded by an electron shell. Previously it was thought that atoms were the smallest form of matter therefore ultimately stable and indivisible. However, in 1919 Ernest Rutherford was able to break apart the nucleus of nitrogen with

Principle”. The French team of Pierre and Marie Curie who are known as the parents of nuclear physics came to the realization that the atom has a core, or nucleus. It became apparent that different laws of physics govern the nucleus. In Cambridge England, Sir J.J. Thomson who in 1897 discovered the electron and his pupil Lord Ernest Rutherford discovered the proton. The history of the atomic age was coming right along on a steady pace then in 1905 Albert Einstein wrote the mass-energy conversion equation, and things started to progress very rapidly. In 1932 Sir James Chadwick discovered the neutron, this rovided an ideal projectile for splitting the atom. The final clue to the neutron and atomic energy was when an observation was noted that a peculiar property of the radiation emitted when beryllium is bombarded with alpha particles. In 1938 the discovery of fission of the uranium nucleus by neutron bombardment. In 1940 President Roosevelt organized the National Defense Research Committee, which was determined to develop an atomic bomb. Development and construction of the atomic bomb was the most closely guarded secret in scientific history. This was a

To create a nuclear bomb, nuclear fission must occur. The process of nuclear fission was splitting the nucleus of an atom. Splitting an atom was caused by neutrons firing through one atom and then that atom’s neutrons shoot off into other atoms, starting a chain reaction. In October of 1934, Enrico Fermi, and

During World War II (WWII), President Franklin D. Roosevelt (FDR) organized a committee to advise him “on questions of policy relating to the study of nuclear fission” (Stimson 1947). This committee was involved of all aspects of the atomic project from whether

"Early in 1939, the world's scientific community discovered that German physicists had learned the secrets of splitting a uranium atom. Fears soon spread over the possibility of Nazi scientists utilizing that energy to produce a bomb capable of unspeakable destruction." (UShistory.org). This discovery pushed our nuclear programs into high gear and pushed us into the nuclear age. Many scientists were needed to make this project happen so the U.S. used Albert Einstein and Enrico Fermi. Other brilliant minds

On August 2, 1939, Einstein proposed an interesting to President Franklin D. Roosevelt. This idea, called the atomic bomb, would change the lives of everyone. Making it was easier said than done, though. They needed a team of scientists: Robert Oppenheimer, David Bohm, Leo Szilard, Eugene Wigner, Felix Bloch, Otto Prisch, Rudolf Peierls, Niels Bohr, Emilio Segre, James Franck, Enrico Fermi, Klaus Fuchs, and Edward Teller. Then they had to find U-235, which looked exactly like U-238, a useless material. The process was hard, especially since only mechanical methods worked. Finally, after an extraction system, a magnetic separation, and a gas centrifuge, all that was needed to be done was to test the entire concept in the deserts of Jornada del Muerto (about money).

It was first developed in the 1940s, and during the Second World War to 1945 research initially focussed on producing bombs which released great energy from the atoms of particular isotopes of either uranium or plutonium.

When the secret to building the ultimate weapon was discovered, the race began to see who could build one first. German physicists unearthed the secret to nuclear fission, splitting a uranium atom, word quickly spread in the science world. A weapon could be created using the newly uncovered truth behind nuclear fission, it could be used to create a very destructive weapon. Eugene Wigner and Leo Szilard, Hungarian physicists, went to Albert Einstein for help to get a letter to President Franklin Roosevelt, explaing the current debacle. They were afraid that if the Germans got their hands on such a powerful weapon, the whole world would be in danger. Alexander Sachs delivered the letter to the president, and he ordered that the bomb be created. The bomb was made using uranium nitrate in lukewarm neutrons, which in turn, transmitted microscopic

Nuclear fusion is an atomic reaction where atoms combine to form a bigger atom with less mass. The most common nuclear fusion is when hydrogen nuclei forms helium nuclei. This occurs in stars that are small such as our sun. When there is low amount in nuclear fuel a star then turns into a red giant as its core grows smaller, denser, and hotter. Our sun will eventually turn into a red giant, theoretically vaporizing Earth. Once the core has nothing to fuse but iron, it will immediately begin the final phase. The temperature in the core rises over 100 billion degrees and then the star explodes. After a supernova, all that’s left of the star is a small, dense core called a neutron star. Also after the explosion, a black hole

Nuclear knowledge has existed for a long time. Nuclear Engineering U.S. Department of Energy relates, ―By 1900, the physicists knew the atom contains large quantities of energy‖ (par 11). Many others formed good theories, such as Ernest Rutherford and Einstein’s contribution with his equation E=mc^2. In 1934

Getting energy from nuclear reactions is a well-established science, tracing back to the discovery of radioactive elements, and eventually to harnessing the energy within those reactions for human needs. The basis of nuclear power is the use of nuclear fission to generate heat, which changes water into steam, and powers a turbine. Nuclear fission is related to radioactive decay, which was discovered in the late 1800s by Henri Becquerel and furthered by Marie and Pierre Curie. Nuclear fission itself was the work of Enrico Fermi – a physicist from Italy. Fermi would later help create the first self-sustaining chain reaction on the grounds of the University of Chicago in 1942. The understanding of nuclear fission and the ability to create chain reactions would lead to the Manhattan Project, culminating in the dropping of two nuclear bombs over Japan at the end of World War II. The technology would later be adapted into more peaceful purposes such as generating energy. Nuclear fission works by bombarding the radioactive element – usually uranium, but sometimes plutonium – with neutrons. When the neutron hits the element, it will split into two lighter atoms, releasing more neutrons, and energy. Those