What is Democracy essays

What is Democracy essays Although the word democracy, in Greek, means rule by the people, there is much disagreement universally over the precise requirements of democracy. 1. Ecclesia composed of all male citizens who met 40 times a year to decide everything. Exclusivity, because there were three slaves for every two Athenians (and because women were excluded) Scale, because direct democracy only works for very small populations. Clisthenes (instituted reforms in Athens between 508 and 501 BCE) He is the founder of democracy Although property ownership remained a requirement to participate in the decision-making process, he enlarged the citizen rolls, diminished the power of the aristocracy, and elevated the role of the assembly. He divided Athens and the surrounding area into precincts (called demes), each of which elected its own officers. This move weakened the power of the aristocracy. A council of 500 of these officers was responsible for general government duties, such as receiving emissaries, maintaining finances, and preparing legislative proposals for the Assembly to pass or reject. The Ecclesia, or Assembly, was comprised of all adult male citizens. It met about 40 times annually and decided everything. He believed that a Pan-Hellenic campaign against Persia and the conquest of Asia Minor would be the solution to the economic, social, and political problems that had brought poverty and civil war to the Greek cities ever since the Peloponnesian War. All things emanate from an unseen source of Good, which we can comprehend through philosophical contemplation. Our environment is the mere image of reality, so the study of our environment is pointless. ...

The Relationship Between Electricity and Magnetism

The Relationship Between Electricity and Magnetism Electricity and magnetism are separate yet interconnected phenomena associated with the electromagnetic force. Together, they form the basis for electromagnetism, a key physics discipline. Key Takeaways: Electricity and Magnetism Electricity and magnetism are two related phenomena  produced by the electromagnetic force. Together, they form electromagnetism.A moving electric charge generates a magnetic field.A magnetic field induces electric charge movement, producing an electric current.In an electromagnetic wave, the electric field and magnetic field are perpendicular  to one another. Except for behavior due to the force of gravity, nearly every occurrence  in daily life stems from the electromagnetic force. It is responsible for the interactions between atoms and the flow between matter and energy. The other fundamental forces are the weak and strong nuclear force, which govern radioactive decay and the formation of atomic nuclei. Since electricity and magnetism are incredibly important, its a good idea to begin with a basic understanding of what they are and how they work. Basic Principles of Electricity Electricity is the phenomenon associated with either stationary or moving electric charges. The source of the electric charge could be an elementary particle, an electron (which has a negative charge), a proton (which has a positive charge), an ion, or any larger body that has an imbalance of positive and negative charge. Positive and negative charges attracts each other (e.g., protons are attracted to electrons), while like charges repel each other (e.g., protons repel other protons and electrons repel other electrons).   Familiar examples of electricity include lightning, electrical current from an outlet or battery, and static electricity. Common SI units of electricity include the ampere (A) for current, coulomb (C) for electric charge, volt (V) for potential difference, ohm (ÃŽ ©) for resistance, and watt (W) for power. A stationary point charge has an electric field, but if the charge is set in motion, it also generates a magnetic field. Basic Principles of Magnetism Magnetism is defined as the physical phenomenon  produced by moving electric charge. Also, a magnetic field can induce charged particles to move, producing an electric current. An electromagnetic wave (such as light) has both an electric and magnetic component. The two components of the wave travel in the same direction, but oriented at a right angle (90 degrees) to one another. Like electricity, magnetism produces attraction and repulsion between objects. While electricity is based on positive and negative charges, there are no known magnetic monopoles. Any magnetic particle or object has a north and south pole, with the directions based on the orientation of the Earths magnetic field. Like poles of a magnet repel each other (e.g., north repels north), while opposite poles attract one another (north and south attract). Familiar examples of magnetism include a compass needles reaction to Earths magnetic field, attraction and repulsion of bar magnets, and the field surrounding electromagnets. Yet, every moving electric charge has a magnetic field, so the orbiting electrons of atoms produce a magnetic field; there is a magnetic field associated with power lines; and hard discs and speakers rely on magnetic fields to function. Key SI units of magnetism include the tesla (T) for magnetic flux density, weber (Wb) for magnetic flux, ampere per meter (A/m) for magnetic field strength, and henry (H) for inductance. The Fundamental Principles of Electromagnetism The word electromagnetism comes from a combination of the Greek works elektron, meaning amber and magnetis lithos, meaning Magnesian stone, which is a magnetic iron ore. The ancient Greeks were familiar with electricity and magnetism, but considered them to be two separate phenomena. The relationship known as electromagnetism wasnt described until James Clerk Maxwell published A Treatise on Electricity and Magnetism in 1873. Maxwells work included twenty famous equations, which have since been condensed into four partial differential equations. The basic concepts represented by the equations are as follows:   Like electric charges repel, and unlike electric charges attract. The force of attraction or repulsion is inversely proportional to the square of the distance between them.Magnetic poles always exist as north-south pairs. Like poles repel like and attract unlike.An electric current in a wire generates a magnetic field around the wire. The direction of the magnetic field (clockwise or counterclockwise) depends on the direction of the current. This is the right hand rule, where the direction of the magnetic field follows the fingers of your right hand if your thumb is pointing in the current direction.Moving a loop of wire toward or away from a magnetic field induces a current in the wire. The direction of the current depends on the direction of the movement. Maxwells theory contradicted Newtonian mechanics, yet experiments proved Maxwells equations. The conflict was finally resolved by Einsteins theory of special relativity. Sources Hunt, Bruce J. (2005). The Maxwellians. Cornell: Cornell University Press. pp. 165–166. ISBN 978-0-8014-8234-2.International Union of Pure and Applied Chemistry (1993). Quantities, Units and Symbols in Physical Chemistry, 2nd edition, Oxford: Blackwell Science. ISBN 0-632-03583-8. pp. 14–15.Ravaioli, Fawwaz T. Ulaby, Eric Michielssen, Umberto (2010). Fundamentals of applied electromagnetics (6th ed.). Boston: Prentice Hall. p. 13. ISBN 978-0-13-213931-1.

'Human capital' (economics) Essay Example | Topics and Well Written Essays - 500 words

'Human capital' (economics) - Essay Example Labor productivity refers to the amount of output produced per unit time. It is a measure of economic growth for a country. One of the factors which are shown to contribute positively towards increased labor productivity is human capital. Several studies at the macro as well as the micro level have been conducted which show a positive relationship between the investment in human capital and productivity; i.e. the better the quality of human capital the higher the earnings as well as the capability to generate efficient output. Studies by Becker (1964), Schultz (1961) and Miner (1971) have proven that there exists a positive relationship between human capital and labor productivity which then translates into higher economic growth. Investment in human capital increases workers’ efficiency and it helps produce better quality products at lesser costs which contribute to economic growth. Investment in human capital ensures that workers are aware of production methods and technologies. This prevents them from wasting precious business resources which enhances productivity. When the labor productivity is higher, there is more output available for the country to market and sell. This increased capability then translates into higher local and international earnings thus speeding up economic growth. Recently, economies such as the Philippines, Malaysia and Thailand etc. have proven the importance of investing in human capital. These economies have sped up their economic growth rates tremendously by investing in education and training for its labor force thus highlighting the positive relationship between human capital, labor productivity and economic