Thursday, 22 January 2015

Study In Canada For Italian Students


Documents required to enter Canada without a visa:

- Passport valid for at least six months

- Ticket round trip *

- Evidence that enrollment in a university or a school that is located in Canada *

- Documents proving that the student is in possession of the necessary requirements to stay in Canada *

* These documents may be obtained at the border or at the airport at the discretion of the competent authorities

Documents required to take courses of study with a duration of more than six months:

Release time: 1 months

- Passport valid for at least six months

- Two passport photos

- Application form of study permit

- Family information form (click here to download)

- Letter of acceptance of the university or institution where you intend to study

- Documents proving that the student is in possession of the economic requirements needed to stay in Canada. These documents may be requested (the consulate will tell you what documents are needed for your specific case):

· Bank statement for the last 3 months (the applicant or a family member)
· Savings
· Copies of contracts relating to real property
· Documents proving that the student has a scholarship
· Canadian bank account made payable to the student

- Certified criminal of all countries where the student has resided for more than 6 months after the age of eighteen years of age

- Proof of legal custody (only for students under age)

- Certificate of acceptance of Quebec (only for those who wish to study in Quebec, click here to visit the website of the Ministry of Immigration)


gravitational force

Between two bodies an attractive force called gravity, which depends on their masses and separation between the two appears. The gravitational force decreases with the square of the distance, ie to increase the separation force value decreases squared.

The gravitational force is calculated as:

F= G*mm/r

G = Constant of universal gravitation. Is a value that does not depend on mass or bodies.


The weight is a gravitational force exerted by the acceleration of the Earth (or another planet). Unlike the weight mass depends on the severity and distance to which the body is located.

Weight is a force and Newton's second law is calculated as mass times acceleration, with the same corresponding to the gravity of the earth and therefore we call it "g" instead of "a".

P = m g

m = Mass
g = acceleration of gravity
P = weight in newtons.

Weight is a force exerted on different bodies as every force has its reaction torque, which in the case of weight; this pair is in the earth.

Most Famous Theories Of Albert Einstein

Albert Einstein

1 The special theory of relativity (TER)

Einstein's greatest contribution as an inventor was his theory of relativity e = mc², the relationship between energy and mass. The formula was instrumental in the development of atomic energy would lead to the creation of weapons that would be used to end World War II. Although Einstein did not design the atomic bomb, urged President Franklin Roosevelt to develop it and use it before Germany. Atomic energy has led to new technologies, including its use as an energy source.

2 Quantum theory

Einstein showed that light consisted of microscopic particles, photons, containing energy when it took advantage, producing heat. The energy is proportional to the frequency of the light wave. His theory dealt with atomic and subatomic systems, a deviation from the classical theory of physics. Einstein's theory laid the foundations of quantum mechanics developed, among other things, the superconductor.

3 The Refrigerator

The only product that Einstein invented absorption refrigerator was not used electricity. developed in 1926 with a former student, Leo Szilard. The fridge had no moving parts and worked only with a heat source such as a gas burner. Designed for use in developing countries, Einstein and Szilard refrigerator patented in 1930 in the United States. In 2008, engineers at the University of Oxford created a design based on Einstein refrigerator as a possible ecological prototype version.

Wind Electricity


Wind energy is energy generated by the use of the wind. Since ancient times, this type of energy has been used by humans, mainly to boost vessels develop navigation and windmills.

At present, wind power, is considered an important source of energy because it is a clean energy source that generates no pollution and does not harm the environment. Large turbines or wind turbines are placed in open areas where you can get a lot of wind. And through the movement captured by a generator, can generate electricity. Currently, only 1% of the energy generated in the world comes from this source of wind energy. However, the potential for exploitation is great. At present, global wind power capacity of 238.4 GW (gig watts).

The countries that generate more wind power are: Italy (6700 MW), China (62,700 MW) France (6800 MW), UK (6500 MW), Canada (5200 MW), United States (46,900 MW), Portugal (4000 MW), Germany (29,000 MW), , Spain (21,600 MW), and India (16,000 MW).



Transistor is an electronic semiconductor device for amplifying, converting and generating electrical signals. All types of transistors perform its primary task by the current control high power using low power current. Hence, the two key functions of the device in an electric circuit - a switch and an amplifier.

Bipolar transistor

An electronic semiconductor device, one of the types of transistors, for amplifying, converting and generating electrical signals. Bipolar transistor called because in the device simultaneously involved two types of charge carriers - electrons and holes. This is different from a uni polar (field) of the transistor, in which involved only one type of charge carriers.

FET control PN-transition JFET
FET control PN-transition JFET

Field-effect transistor with insulated-gate MOSFET

A field effect transistor with insulated gate - a transistor whose gate is electrically insulated from the conductive channel of the semiconductor layer dielectric. Due to this, in the transistor very high input impedance (for some models it reaches 1017 ohms).

The Electrical Resistivity


The electrical resistivity of the electrical resistivity of matter is made of a cube with sides equal to one (1 meter) when the current goes perpendicular to its two opposite faces, an area of 1 square meter each.

The resistivity depends on the concentration of free electrons in the conductor and the distance between the ions of the crystal lattice, in other words, the material of the conductor.
The dimension of the electrical resistivity in SI (International System of Units, Eng. - International System of Units) - Ohm-m [Ohm * m ^ 2 / m] (SI - Ω • m, Rus. - Ohm meter, Eng. - Ohm-meter).

 For the measurement of electrically conductive materials may be used non-SI units - Ohm mm2 / m (for millimeter-section of a conductor length of 1 m., That is - millionth of a meter-ohms).

The physical meaning of the resistivity: material (homogeneous and isotropic *) has the electrical resistivity of one ohm-m, if made of this material is a cube with sides of 1 meter has a resistance of 1 ohm when measured on the opposite faces of the cube.