Essay about String Theory

String Theory is the theory of a theoretical framework in which the point-like particles of particle physics are replaced by one dimensional object called strings. The theory describes how the strings proliferate through space and cooperate with each other. On distances larger than the string scale, a string looks like an ordinary particle, with charge, mass and other properties determined by the vibrational state of the string. One of these vibrational states that the strings corresponds to the graviton, the quantum mechanical particle that carries gravitational force and therefore if string theory were to be correct, it would also prove the existence of the graviton. However String theory cannot be proved because the string unit is not yet measurable and even if the string unit could be measured, other elements of string theory (such as its proposed 11 dimensional cosmology) would also need to be verified empirically. (Krause,

To discover what the universe is made of and how it works is the challenge of particle

* We use scientific theories to understand events beyond what our imaginations can often handle, ie; Newton’s theories on attraction of masses.

Theories are a series of interconnected proposals. Theories are an effort to describe, explain, predict, and finally control a period of events. We are able to base our experiments and select the contenders for the experiments off of our theories. We are able to test our theories by how well the cumulated data describes, relates to and predicts reality. Theories act as patterns for interpreting specific data that we may refer back to. These patterns ensure we stay on topic and are able to obtain the proper results needed to verify our theories.

Radioactive Decay is the spontaneous breakdown of an atom's nucleus, releasing energy and mass from the atom and often forms new elements. The process is called Transmutation, in which the energy process is continued until it creates and a new element is formed that has a stable nucleus and is not radioactive.

In simple terms, the big bang theory is a scientific attempt to explain a question mankind asked from the beginning of time: “Why are we here and where did we come from?”

Atoms are made out of different particles such as protons, electrons, neutrons, and atoms have a nucleus in the middle. The number of protons determines the atomic number. Protons also have a positive charge and are the largest particle. The electrons orbit the nucleus and have a negative charge, they are also the smallest particle found in an atom. Neutrons have a neutral charge and are located in the nucleus.

Nuclear weapons derive their power from the energy released when a heavy nucleus is divided, called fission or when

These particles are forced together in the atomic nucleus by the strong force. More neutrons can make stability greater in the strong nuclear force interactions among the particles that are packed in a superheavy nucleus which would otherwise repel each other.

Quantum Mechanics is the science of subatomic particles and their behavior patterns that are observed in nature. As the foundation of scientific knowledge approached the start of the twentieth century, problems began to arise over the fact that classic physical ideas were not capable of explaining the observed behavior of subatomic particles. In 1913, the Danish physicist Neils Bohr, proposed a successful quantum model of the atom that began the process of a more defined understanding of its subatomic particles. It was accepted in the early part of the twentieth century that light traveled as both waves and particles. The reason light appears to act as a wave and particle is because we are noticing the

"What Is String Theory?" Universidad Nacional Autónoma De México. Instituto De Ciencias Nucleares UNAM, 9 Sept. 2004. Web. 02 Nov.

As the National Academy of Sciences explains, a scientific theory is “a comprehensive explanation of some aspect of nature that is supported by a vast body of evidence” (Scientific). Scientific theories

According to Haralambos and Holborn (2008), a theory is a set of ideas which attempts to explain how something works.

The Strong Nuclear Force (also referred to as the strong force) is one of the four basic forces in nature (the others being gravity, the electromagnetic force, and the weak nuclear force). As its name implies, it is the strongest of the four. However, it also has the shortest range, meaning that particles must be extremely close before its effects are felt. Its main job is to hold together the subatomic particles of the nucleus (protons, which carry a positive charge, and neutrons, which carry no charge. These particles are collectively called nucleons). The protons must feel a repulsive force from the other neighboring protons. This is where the strong nuclear force comes in. The strong nuclear force is created between nucleons by the exchange of particles called mesons. This exchange can be likened to constantly hitting a ping-pong ball or a tennis ball back and forth between two people. As long as this meson exchange can happen, the strong force is able to hold the participating nucleons together. The nucleons must be extremely close together in order for this exchange to happen. The distance required is about the diameter of a proton or a neutron. If a proton or neutron can get closer than this distance to another nucleon, the exchange of mesons can occur, and the particles will stick to each other. If they can't get that close, the strong force is too weak to make them stick together, and other competing forces (usually the electromagnetic force) can influence the particles to move apart. This is represented in the following graphic. The dotted line surrounding the nucleon being approached represents any electrostatic repulsion that might be present due to the charges of the nucleons/particles that are involved. A particle must be able to

In order to attempt to trace the origins of the modern science that we now refer to