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Friday, 11 September 2015

George Simon Ohm

ohm


George Simon Ohm (Erlangen, March 16, 1789-Munich, July 6, 1854) was a German physicist and mathematician who contributed to the theory of electricity Ohm's Law, known for his research on electrical currents.

 He studied the relationship between the intensity of an electric current, the electromotive force and resistance, formulated in 1827 the law that bears his name stating that: I = V / R also became interested in acoustics, the polarization of the batteries and light interference.

The unit of electrical resistance, the ohm, is named in his honor.1 finished occupying the position of conservative cabinet of Physics of the Bavarian Academy of Sciences and Humanities.

Tuesday, 8 September 2015

Higher Education in Saudi Arabia

Higher Education in Saudi Arabia


Higher education in Saudi Arabia is consistent with the US higher education system, but modified to accommodate Islamic traditions and customs.

The first college, King Saud University, was founded in Riyadh in 1957. The Ministry of Higher Education oversees all higher education in the country, with a particular focus on scientific research universities government. More than 200,000 students are enrolled in Saudi universities, about half of the students are women.

International students will find a friendly atmosphere in Saudi Arabia, and the government even offers special scholarship programs specifically for students who are not Saudis.

Saudi Arabia is one of the best places in the world to master's programs in Islamic studies in the country also offers a full cultural immersion and Arabic for students not from the Middle East or non-native Arabic speakers. In addition to Islamic studies, modern Saudi institutions offer a wide range of master's programs in art, science, engineering, agriculture, medicine, education, computing and information science.

Many masters curricula are taught in English, especially in technical areas such as engineering.

Saturday, 5 September 2015

Thermodynamics

Thermodynamics


Thermodynamics is the discipline inside the mother science, physics, deals with the study of the relationships established between heat and other forms of energy. Among other issues thermodynamics deals with analyzing the effects of changes in variables such as temperature, density, pressure, mass, volume, systems and macroscopic level.
The basis on which all studies of thermodynamics loom is the circulation of energy and how it is able to infuse movement.

Worth noting that this issue was just promoted the development of this science, because its origin was due to the need to increase the efficiency of the first steam engines.
Then, from the kickoff, thermodynamics, has been busy describing how systems respond to changes in their environment, and can be applied to countless situations, both science and engineering, such as motors, chemical reactions, phase transitions, transport phenomena, black holes, among others. And so their results are really appreciated for physical chemistry and chemical engineering.

Meanwhile, Thermodynamics has three fundamental laws ... the first law is popularly known as the principle of conservation of energy and states that if a system exchanges heat with another, its own internal energy change. In this case, the heat energy will be required to exchange a system to compensate for differences between the internal energy and work.

For its part, the second law proposes various restrictions on transfers of energy, which could be realized if one considers the first law; the second principle speaks of regulating direction in which are carried out thermodynamic processes, imposing the possibility that these are developed in the opposite direction. This second law rests against entropy (physical quantity measuring part of the energy may be used to produce work).

And the third and last law holds that it is impossible to reach a temperature equal to absolute zero through a finite number of physical processes.

And the most important processes that take place in thermodynamics are: isothermal (temperature unchanged), isobaric (pressure unchanged), Isochoric (the volume does not change) and adiabatic (no heat transfer occurs).

Wednesday, 2 September 2015

Vector Product

Vector Product


In mathematics, the Gibbs vector product or cross product is a binary operation between two vectors in three dimensional space.

 The result is a vector perpendicular to the vectors are multiplied, and therefore normal to the plane containing them. Because of their ability to get a vector perpendicular to two other vectors, whose meaning varies according to the angle formed between these two vectors, this operation is frequently applied to solve mathematical, physical or engineering problems.