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A Summary Ion Channels In The Membrane
869 wordsA Summary: Ion Channels in the Nerve-Cell Membrane In this article, Richard D. Keynes details the workings of ion channels in nerve cell membranes. Nerve impulses (action potentials) are the unit by which information travels in an organisms nervous system, and the generation of this action potential is dependent on the nerve membrane being permeable to ions which in turn makes said membrane excitable. Electrical activity of a nerve is triggered by a depolarization across the membrane and this al...
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Dry Ice Petri Dishes
1,905 wordsA particle cloud chamber is a device that makes visible to the human eye the presence of certain particles and cosmic rays. This paper will discuss the process in which a successful chamber prototype was developed. This paper will also discuss how the chamber utilizes the properties of a supersaturated environment to detect these particles. Finally, plans for the future development of a larger model to study the charge and energy of particles through the use of a magnetic field is presented. The...
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The Northern Lights Aurora Borealis
1,012 wordsYou are outside on a clear summers night, when all of a sudden a flash catches your eye. You whirl around in bewilderment as the black night sky flashes and dances with a whirling array of colors. The northern horizon is draped with an iridescent green, deep blues, sharp violets, scarlet reds, and bright oranges and yellows. You stand awestruck as the colors descend, like a melting rainbow, across the sky. Then, as quickly as they appeared, they vanish without a trace. On clear nights, when the ...
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Star Traveling To The Millennium
1,884 wordsNASA's goal of faster, better, cheaper has been the motivation for them to develop new mission concepts, and to validate never-before-used technologies in space. The new technologies, if proven to work, will revolutionize space exploration in the next century. According to NASA's New Millennium Program home page, last updated on September 16, 1999, NASA's current project of Deep Space 1 demonstrates some of their most exotic technologies. One of the most impressive is the testing of an ion engin...
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Earths Surface Earths Crust
4,346 wordsEARTH The Earth, mans home, is a planet. The Earth has special characteristics, and these are important to man. It is the only planet known to have the right temperature and the right atmosphere to support the kind of environments and natural resources in which plants and man and other animals can survive. This fact is so important to man that he has developed a special science called ecology, which deals with the dependence of all living things will continue to survive on the planet. Many milli...
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Charged Particles Electrical Engineering
296 wordsAssignment # 2 Expanded Definition Semiconductor The purpose of this definition is to create a better understanding of the very complex term semiconductor. This definition would be very beneficial to any individual involved or interested in the highly technical field of electrical engineering. I believe that this definition would be best suited for students enrolled in electrical engineering, because the concepts are laid out in a clear format. A semiconductor is a solid material whose ability t...
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Hydrogen Bomb Nuclear Fusion
2,740 wordsFusion reactions are inhibited by the electrical repulsive force that acts between two positively charged nuclei. For fusion to occur, the two nuclei must approach each other at high speed to overcome the electrical repulsion and attain a sufficiently small separation (less than one-trillionth of a centimeter) that the short-range strong nuclear force dominates. For the production of useful amounts of energy, a large number of nuclei must under go fusion: that is to say, a gas of fusing nuclei m...
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Earth Surface Seismic Waves
2,491 wordsNotes on the lithosphere- (rock sphere) Upper most part is crust of earth. Compiled of rocks of outer crust. Outermost shell. Upper part- rocks we see at and near the earths surface. Crust is 5 to 10 km thick under most oceans and 24 to 60 km thick under the continents. The lithosphere under the crust is solid, dense material. (more dense than surface materials). Lithosphere 100 - 200 km. Notes on the asthenosphere- zone beneath the lithosphere. Thick like tar. Weak because of high temperatures ...
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H 2 O Mass Spectrometer
531 wordsAMass Spectrometer Mass Spectrometer A mass spectrometer produces charged particles (ions) from the chemical substances that are to be analyzed. The mass spectrometer then uses electric and magnetic fields to measure the mass (weight) of the charged particles. There are many different kinds of mass spectrometers, but all use magnetic and / or electric fields to exert forces on the charged particles produced from the chemicals to be analyzed. A basic mass spectrometer consists of three parts: 1. ...
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Charged Particles Electric Charge
1,314 wordsJ. J. Thomson Science lecturers who traveled from town to town in the middle nineteenth century delighted audiences by showing them the ancestor of the neon sign. They took a glass tube with wires embedded in opposite ends... put a high voltage across... pumped out most of the air... and the interior of the tube would glow in lovely patterns. In 1859 a German physicist sucked out still more air with an improved pump and saw that where this light from the cathode reached the glass it produced a f...
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Renewable Energy Sources Fossil Fuels
2,607 wordsEnergy is one of the most fundamental parts of our universe. We use energy to do work. Energy lights our cities. Energy powers our vehicles, trains, planes and rockets. Energy warms our homes, cooks our food, plays our music, gives us pictures on television. Energy powers machinery in factories. Energy is defined as the ability to do work. When we eat, our bodies transform the food into energy to do work. When we run or walk, we burn food energy in our bodies. When we think or read or write, we ...
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Positive And Negative Positively Charged
1,073 wordsStatic Static Electricity Static Electricity Static electricity is electricity at rest, which is an accumulation of electric charge. This source of energy is the opposite of moving electric charge, known as electric current. It is part of the study of phenomena resulting from electric charge, called electrostatics. Electrostatics is actually one of the foundations of knowledge about electricity. Static electricity is clearly the oldest known form of electricity. The earliest understandings of st...
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Subatomic Particles Angular Momentum
3,969 wordsThe atom, although small in size and great in number, is one of the greatest enigmas in the science world today. Over 200 different subatomic particles have been found, and scientists are still looking for more. The most basic parts of the atom are the electron, the proton and the neutron. These three make up a small group of the know subatomic particles. Of these three only the electron is actually a fundamental particle. The proton and neutron are both hadrons composed of different smaller par...
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